RICAN ORTICULTURlSf

NEWS EDITION-SEPTEMBER 1983 Pawpaw: The Forgotten American Fruit Nutritional studies indicate that the American pawpaw (Asimina tri­ loba), a long-neglected American na­ tive that bears excellent-tasting fruit, may emerge as one of our most val­ uable fruit trees. Chemist John P. Cherry of the U.S.D.A. Eastern Regional Research Center in Philadelphia, Pennsylvania analyzed the nutritional value of pawpaws and found that their fruit, which is unusually low in moisture content, is actually higher in unsatu­ rated fats, proteins and carbohy­ drates than three other more com­ mon fruits-apples, peaches and grapes. In addition, the pawpaw has exceptionally high levels of the amino acids that are essential to the human diet-over six times the amounts found in the three other fruits tested. According to Cherry, pawpaws also have high vitamin A and C con­ tent. For example, their vitamin A content is about the same as in ap­ ples and grapes, and although paw­ paws have less vitamin C than do citrus fruits, they have more than twice the amount found in apples, 8 peaches or grapes. Finally, pawpaws are higher in potassium, phospho­ g rus, magnesium, sulfur and iron than the three other fruits tested. A botanical drawing of pawpaw, Asimina triloba, published in 1890 in Silva of North America. Despite its sweet, pearlike fruit, which has the texture of a banana agation techniques, and shipping and can be domesticated successfully. and a fragrant aroma, pawpaws handling methods before pawpaws -Agricultural Research, April 1983 have not been cultivated widely; they are only found growing in a few home gardens. Pawpaws are shade tolerant, have attractive fo­ Inside This Issue liage, and are relatively disease and insect free. Unfortunately, little has • River Farm Notes ...... 3 been done to improve the species • Plants Wanted ...... 4 through breeding and selection. • Two New Plants Proposed as Endangered ...... 5 More information will need to be • Gardener's Dateline ...... 6 gathered on cultural practices, prop- • Disease-Resistant Crab Apples for Gardens ...... 12 Sharing the Beauty Double Your

I Society members occasionally write Of course, many AHS members Giving Power ( to offer us back copies of American make Society publications a perma­ Horticulturist. Some long-time mem­ nent part of their gardening librar­ Did you know that hundreds of bers even offer to send issues of ies. But if you find you need the ex­ companies provide, as a benefit to American Horticulturist's predeces­ tra space and must weed out your their employees, matching gifts to sor, The American Horticultural collection, I am sure you will share non-profit organizations? For exam­ Magazine. We appreciate this the pleasure I feel when I think of . pIe, an employee of IBM who con­ thoughtfulness, and gladly accept our magazines delighting new read­ tributes $20.00 to the American copies of certain issues that are in ers who might otherwise not have a Horticultural Society can fill out a very short supply. But, except for chance to see them. form requesting that IBM "match" the rare issues listed below, we have Issues We Need to Complete his gift to AHS. Under the compa­ ample back issues in our office ar­ ny's guidelines, AHS qualifies as a chives, and, as we seldom sell back Our File: cultural institution for a matching issues, we cannot justify the space 1982: February, May, June, August, gift. IBM doubles the employee's required to add substantially to our October (Nos. 2, 5, 6, 8 and 10) contribution to AHS, giving the So­ inventory. 1981: July and October (Nos. 7 ciety $40.00. Combine this with the If you have back issues you no and 10) employee's own contribution, and longer wish to keep, please check 1979-80: December/January (No.6) the Society receives $60.00 instead the list below. I would be delighted 1977: Late Spring (No.3) and Late of the $20.00 the member alone if you wish to donate to the Society Summer (No.4) could provide. any of the issues we need. As for 1976: Early Spring (No.2), Fall The Society has received several those we cannot use, I would like to (No.5), and Winter (No.6) such matching gifts this year, and suggest that members donate these 1974: Spring (No.1) and Late we are grateful to those members to community or college libraries, or Summer (No.3) who have investigated their employ­ to hospitals and nursing homes. -Connie Clark ers' policies and filled out the ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ matching gift forms. Programs vary ,.. from company to company; some employers will match your member­ }\\ffiRIaN Upcoming ship dues while others will match only straight contributions. Why not - RORTICULTURIST AHSEvents ask about your company's policy? VOLUME 62 NUMBER 9 You may find that, with the help of The following Society-sponsored your employer, you have more giv­ EDITOR tours and other events have been ing power than you had imagined. Barbara W. Ellis scheduled for this fall. For more in­ -Connie Clark ART DIRECTOR formation about any of these events Rebecca K. McClimans write or call the Society'S Education ASSOCIATE EDITOR Department. Lynn M. Lynch Avant Gardener EDITORIAL A.SSISTANT Jane Steffey September 14-18 IPM Special Issue Address all eGlitorial correspondence to: AHS Annual Meeting in Philadel­ The Editor, American Horticulturist phia, Pennsylvania. American Horticultural Society Available Box 0105 September 18-25 Mount Vernon, Virginia 22121 Gardeners interested in integrated AMERICAN HORTICULTURIST is pub­ Post-Conference Tour of the Eastern pest management will want to send lished monthly by the American Horticul­ Seaboard. for the new special issue of the tural Society, 7931 East Boulevard Drive, Avant Gardener, which is devoted Alexandria, Virginia 22308, 703-768-5700. October 9 entirely to the subject. The eight­ Dues for membership in the Society start Fall Festival at River Farm, Mt. Ver­ page issue discusses bacterial insecti­ at $20 per year, $12 of which is for non, Virginia, from 11 :00 a.m. to AMERICAN HORTICULTURIST. Copy­ cides, beneficial insects, trap and right © 1983 by The American Horticul­ 4:00 p.m. snare techniques, botanical insecti­ tural Society. cides and includes both a source and The American Horticultural Society is a November 1-24 a reference book list. non-profit organization. Contributions are AHS Autumn in the Orient Tour of "New Ways In Pest Control" is deductible for income tax pllrposes. Japan, Taiwan and Hong Kong. available for $1.50 from The Avant ISSN ·0096-4417. Second-class postage paid Gardener, PO Box 489, New York, at Alexandria, Virginia and at additional November 5 mailing offices .. Postmaster: Please send NY 10028. A free sample copy of Form 3579 to AMERICAN HORTICUL­ AHS Mini-Symposium in Baltimore, The Avant Gardener will be sent TURIST, Mount Vernon, Virginia 22121. Maryland. with each order for the special issue.

2 • SEPTEMBER 1983 GARDENERS: River Fann Notes Make Whenever I think of autumn my tions of a soluble liquid plant ferti­ mind's eye always seems to conjure lizer such as Peters 9-45-15 (two ta­ Your up images of autumn foliage and blespoons per gallon) or 20-20-20 masses of chrysanthemums ablaze (one tablespoon per gallon) from Own with yellow, orange, bronze and red. mid-summer until just before they River Farm has always been bloom. Brown blessed with excellent fall foliage, Pests: Chrysanthemums are gener­ Gold! but it has never been able to boast a ally pest-free, but occasionally an truly superb chrysanthemum plant­ application of malathion or Sevin® Don't throwaway grass clippings, ing-until now. Thanks to the won­ used-up crops, kitchen garbage, will be needed to combat sucking in­ old newspapers, hedge and tree trim­ derful people associated with the sects. Benlate may also be required mings, etc. Feed everything (even Old Dominion Chrysanthemum So­ to combat various fungi. steak bones) to this WoW Shredder/ ciety, we now have an outstanding Grinder. It will turn it all into instant Pinching: If you want nice full mulch and compost... in seconds! display of these plants, so indispen­ plants in the fall, your chrysanthe­ sable to the fall garden. As you read Re-cycle everything organic. There's mums, with the exception of cush­ a model just right for you ... including this column, the 350 plants in our ion mums, will require occasional our new Tomahawk, the only Shred­ new chrysanthemum bed will be just pinching. As soon as plants reach der/Grinder made for suburban coming into bloom. These lovely the height of six inches (generally in gardens. Write for more details! harbingers of autumn will add mid-May), nip off the top two ------Mail to: greatly to our display this season inches. Pinching will result in lots of and for many seasons to come. WoW Grinder, Inc. new growth, so another pinching 2957 N. Market SI., Room 21093 , Wichita, KS 67219 Chrysanthemums are easily grown will usually be necessary four to six Telephone : (316) 838-4229 plants, and gardeners who take a lit­ weeks later (when the new growth o Please rushdetailsonyourW- WShredder/G rinders. tle time to learn about and fulfill has reached six inches in length). Name ______their needs cannot help but succeed Pinching can be continued right up with them. I can think of no better Address ______until the middle of July without time than the present to go over a City ______causing any delay in blooming. few basic cultural requirements. Winter Protection: Once flowering State _ _ ~Zip,------_ Sun: Chrysanthemums love lots of is completed it is time to cut the sun, but they don't mind a little stems back to six inches and mulch NOW.•• BY MAIL! shading from the hot afternoon sun. over the plant to ready it for winter. FLOWER ARRANGING Soil: Give mums a good, rich soil In colder areas you may wish to dig SUPPLIES: with a pH slightly on the acid side your mums and overwinter them Tools, Techniques, and good drainage. It is a good idea (mulched) in cold frames. Tricks of the Trade! to amend your soil annually with If you are not yet a mum grower, several inches of compost, well-rot­ consider them for next year's gar­ SPECIAL OFFER - ted manure or leaf mold. dens; you are certain to love them MAKES A GREAT GIFT: Fertilizers: Use a good vegetable­ as much as we do. And remember, type fertilizer during planting (two take good care of your plants, and to three pounds per 100 square they will reward you many times The Original feet). Add to this weekly applica- over. -Steve Davis Stem Stripper A unique tool for removing thorns and leaves from stems. 95 i ncluding only $9ea. postage [, handling

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Satisfaction Guaranteed or Your Money Backl AMERICAN HORTICULTURIST. 3 Seed Donations PIANrs WANTED The AHS Seed Program is already underway, and members who have r seed they would like to share are Members who are growing or who • Haworthia margaritifera, pear once again invited to participate. have access to any of the plants in plant, rosette-forming, green-leaved Members are asked to send their this month's column are invited to plant whose leaves are covered with seed donations directly to Steve help their fellow members locate pearly tubercles.. Clivia miniata­ Davis at the address below. Please their "Plants Wanted" by writing di­ any pure yellow-flowered cultivar. include the following information rectly to the addresses listed below. Faith Bentley, R.D. 1, Box 46, Ches­ with each batch of seed: name of ter Springs, PA 19425. plant, both Latin (if possible) and common; a brief description; date • Ilex opaca 'Arden' and 'Claren­ collected and location. Please be don Spreading', both are old culti­ sure the seed is clean, dry and vars of American holly. G. R. Stil­ clearly labeled before mailing. Sug­ well, Jr., 11900 Coachmans Way, gestions for germination instructions Raleigh, NC 27614. would be appreciated. Please address questions and seed • Inga vera, commonly called the to Steve Davis, American Horticul­ guaba inga. Ms. Helen Wong, Sup­ tural Society, P.O. Box 0105, Mt. ply Department, Sabay Softwoods Vernon, VA 22121. Donations must • Viburnum farreri (formerly V. Sdn. Bhd., P.O. Box 137, Tawau, be received before November 1 to fragrans), very fragrant, white-pink­ Sabah, Malaysia. be included in the 1984 Seed Pro­ ish-flowered plant to 10 feet in gram Catalogue. height. Two- to four-inch elliptical • Boronia pinifolia, red bush or leaves. Lois Hunsdarfer, Box 21, rooibosch. Mr. Emery Smith, 3907 Copseyville, NY 12052. Glen Heather Drive, Houston, TX 77068. New AAS Emblem • Rhapidophyllum hystrix, needle U. U. U. palm, blue palmetto, a scrub palm AMERICA AMERICA AMERICA AMERICA • Chrysanthemum anethifolium, E .. known for its winter hardiness. glaucous marguerite. Mr. Charles R. ,e)F,ii1 ,e)rGi1J i )r,,!17; ,E)i!Gi17; Probably hardy to _6° F, U.S.D.A. Scott, 940 Washington Lane, Rydal, All-America Selections, Inc. has se­ Zone 7. Bob Beyer, 2210 Haven PA 19046. Crest Drive, Chattanooga, TN lected a new emblem to signify all of 37421. the annual and vegetable cultivars • Osteospermum 'Wagon Wheels' that have received AAS awards. The and. Achillea ertyaropoda, both • Chrysanthemum species: C. arcti­ coveted gold, silver and bronze med­ cum, C. alpinum, C. anithefolium, ground covers seen at Sissinghurst in als have been given to new introduc­ England. Mrs. C. de Bretteville, P.O. C. corymbosum, C. frutescens, C. tions for more than 50 years. The indicum, C. lacustre, C. macrophyl­ Box 1246, Pebble Beach, CA 94062. new red, white and blue emblem, lum, C. mawii, C. sibiricum, and C. shown here, will replace the old uliginosum. Dr. Hiram Larew, B- • Polygonum orientale, Prince's shield, which read only AU-America 470, BARC-East, U.S.D.A., Belts­ feather or kiss-me-over-the-garden­ Award, as well as the various other ville, MD 20705. gate, a six-foot annual that bears logos used to represent award spikes of bright pink flowers. Wil­ WInners. • Crambe maritima, sea kale, a cru­ liam A. Schwab, R.R. 2, Box 490, ciferous vegetable with large fleshy Buchanan, MI 49107. stems and small leaves. Similar to celery; generally grown from root • Rose 'Editor McFarland', a me­ Errata stocks. Pam Peirce, 288 9th Street, dium pink hybrid tea rose. Edwin L. #6, San Francisco, CA 94103. Heminger, 14771 CR 75, Findlay, In the June issue of American Horti­ OH 45840. culturist two errors appeared in Will • Alnus glutinosa, three cultivars of Ingwersen's article "Buttercups of black ash: 'Pyramidalis', a narrow, Please send your "Plants Wanted" the World." Ranunculus lyallii is a upright form; 'Aurea', a golden­ lists, including genus, species, com­ native of New Zealand, not New leaved cultivar; 'Imperialis', a cutleaf mon name and a brief description to England. Also, the author's name is form .• Acer rubrum 'Phipp's "Plants Wanted," American Horti­ spelled Ingwersen, not Ingwerson. Farm', a red maple cultivar grown culturist, in care of the Society. Gerald Stradley, author of "The in Maine. Dale E. Herman, North Please type or print neatly. We will Other Evening Primroses," informs Dakota State University, Department publish them on a space available us that the photograph on page 30 of Horticulture and Forestry, Fargo, basis after checking for retail of that issue is Oenothera pilosella, ND 58105. sources through our catalogue file. not O. fruticosa.

4 • SEPTEMBER 1983 Two New Plants Proposed as Endangered GREAT NEWS The U. S. Fish and Wi ldlife Service Agave arizonica, commonly called FOR YOUR has proposed two new plants for the Arizona agave, has also been HOUSE PLANTS listing as Endangered species. proposed as Endangered because the AND YOU Torreya taxifolia, an evergreen remaining population is threatened tree native to the Apalachicola River by collection for cultivation and sale Send for FREE region in Florida and Georgia, was and by grazing cattle. A. arizonica INFORMATION on proposed (F.R. 4/7/83) primarily be- was only discovered and described NUTRIPONICSTM­ cause a fungal disease threatens to in 1970, and since then has been Use Coupon Below destroy the remaining population. much sought after by coll ectors for The species has also been threatened desert rock gardens. The plant bears by past habitat reductions. a tall, branching inflorescence with According to the Endangered Spe- pale yellow flowers from the center cies Technical Bulletin, T. taxifolia of a somewhat flattened, globular " has whorled branches and stiff, rosette. A. arizonica reproduces sharp-pointed, needle-like leaves .... slowly, and is unable to repopulate The leaves of the tree have a pun- areas that have been overcollected. gent or resinous odor when crushed, According to the Bulletin, "the thus one common name, 'stinking Arizona agave is endemic to a very cedar'." The fungal disease threaten- small area in the granite hills and ing this species kills the needles and creek bottoms near the summit of stems, causing severe defoliation. the New River Mountains within Now root sprouts less than three the Tonto National Forest .... In meters high are all that remain in 1980, about 25 plants were known Now you can grow healthy plants in­ the wild. at 12 to 14 localities, but today only doors-even tomatoes using a totally All of the remaining mature trees 3 plants are known to remain at new and simple system called "Nutri­ are located in botanical gardens, and only one site. The land use on this ponics" . for that reason the Service has de- area consists of leased cattle graz- This new system uses a modern attrac­ cided not to establish Critical Habi- ing. " For more information on these ti ve planter (or even a used tin can), that tat. However, after research has two plants, please send a self-ad- acts as a water reservoir for a flower pot been conducted to solve the disease dressed, stamped envelope to Assis- permitting long periods without water­ problem, and once recovery efforts tants to the Editor, in care of the Society. ing if you desire. Your plants gradually are underway, Critical Habitat may - Endangered Species Technical absorb all the moisture they require, be established. Bulletin, May 1983, June 1983 simply, easily, practically eliminating leading causes of house plant failure: in­ adequate moisture and overwatering. Fully tested. We have received many let­ ters from customers expressing satisfac­ New Landscape Ecology Association tion. Landscape planners, managers and landscape ecology, which studies the NUTRIPONIC KITS A V AILABLE scientists with an interest in land- development of landscapes. Kits include our 50-page beautifully il­ scape ecology will want to join the For more information on the In- lustrated book on Nutriponics along newly founded International Associ- ternational Association of Landscape with Liqui-SoiITM, special Nutriponic ation of Landscape Ecology. This Ecology write Mr. Frank Golley, pots and planting medium. Windowbox new organization is dedicated to in- Professor of Ecology, IALE, USA also available. creasing communication among spe- Regional Office, School of Environ- cialists in the field and to promoting mental Design, University of Geor- the development of knowledge in gia, Athens, GA 30602. WINDOWSILL GARDENS Grafton, N.H. 03240, Dept. AH

o Send Information 'October Glory' Heals Slowly o Send $9.95 kit o Send $19.80 kit Scientists at Ohio State University's a problem with 'October Glory' Include $2.00 for shipping. Shade Tree Evaluation Plot com- than with 'Red Sunset'. 'October pared wound healing in three culti- Glory' is often killed by severe win- vars of red maple, Acer rubrum. Re- ters, when temperatures drop below Name 0 suits indicate that 'October Glory' -20 F, and has exhibited more wind Address closes wounds more slowly than damage at the Shade Tree Evalua- 'Red Sunset' and 'Autumn Flame'. tion Plot than any other red maple. City, State Zip Growers and nurserymen report that Checks or Money Orders Only graft incompatability is also more of - Horizons, June 1983

AMERICAN HORTICULTURIST • 5 GARDENERS DATEliNE

SEPTEMBER 9-11 American Ivy Society Annual Convention Cox Arboretum, Dayton, Ohio Information: American Ivy Society, P.O. Box 520, West Carrollton, Ohio 45449

SEPTEMBER 10 Red Rose Rent Day The Conard-Pyle Company, Star Roses, U.S. Route 1 and PA Route 796, Jennersville, Pennsylvania Time: 10 a. m. Information: The Conard-Pyle Company, West Grove, PA 19390, (215) 869-2426

SEPTEMBER 11-14 Interior Plantscape Association Annual Conference and Trade Show The Diplomat Hotel, Hollywood, Florida Information: Ann Sher, Interior Plantscape Association, 11800 Sunrise Valley Drive, Reston, VA 22091, (703) 476-8550

SEPTEMBER 14-18 American Horticultural Annual Meeting Philadelphia, Pennsylvania Information: Call the Society'S Department of Education

SEPTEMBER 17-21 American Rose Society 1983 National Convention St. Louis, Missouri Information: Mrs. Lucille Janning, 33 Clark Court, St. Charles, MO 63301, (3 14) 724-8119

SEPTEMBER 18-25 AHS Post-Conference Tour of the Eastern Seaboard Information: Call the Society'S Education Department

SEPTEMBER 21-24 American Association of Botanical Gardens and Arboreta Annual Meeting San Diego, California Information: AABGA, P.O. Box 206, Swarth- more, PA 19081, (2 15 ) 328-9145

SEPTEMBER 23-25 Horticultural Society of New York Fall Harvest Festival This model of wmmon elder (Sambucus canadensis) is one of over 300 botaniGa l models New York, New York on display at Chicago's Field Museum of Natural History in its exhibit "Plants of the World," Information: Horticultural Society of New reopening September 24. Th~ exhibition, the largest of its kind in the world devoted solely to York, 128 West 58th Street, New York, plant life, offers a three-dimensional look at all major forms of plant life, from the simplest to NY 10019, (212) 757-0915 the most complex. For more information about the exhibit write or call the Field Museum of Natural History, Roosevelt Road at Lake Shore Drive, Chicago, IL 60605, (312) 922-9410. SEPTEMBER 24 Rhododendron Species Founda~ion Volunteer Plant Sale SEPTEMBER 24-25 Hours: 10 a.m. to 5 p.m. Federal Way, Washington Pennsylvania Horticultural Society 1983 Information: The Pennsylvania Horticultural Information: Rhododendron Species Founda­ Harvest Show Society, 325 Walnut Street, Philadelphia, tion, P.O. Box 3798, Federal Way, WA Horticulture Center, Fairmount Park, Phila­ PA 19106 98003, (206) 927-6960, 838-4646 delphia, Pennsylvania (215) 625-8250

6 • SEPTEMBER 1983 OCTOBER 1 OCTOBER 12-16 OCTOBER 26-29 Berry Botanic Garden Annual Fall Plant Sale 28th Eastern Orchid Congress and Show American Society of Consulting Arborists Miller Hall, Western Forestry Center, 4033 Radisson Hotel, Wilmington, Delaware Annual Meeting SW Canyon Road, Portland, Oregon Show Hours: Friday 10 a.m. to 10 p.m.; Sat- Pine Mountain, Georgia Hours: 10 a.m. (members), noon to 4 p.m. urday 9 a.m. to noon Information: American Sociery of Consulting (non-members) Show Admission: $2 Arborists, 315 Franklin Road, North Information: Mary Hoffman, 19766 S. Im­ Informati on: Mrs. Kenneth C Smeltz, Regis­ Brunswick, NJ 08902, (20 1) 821-8948 pala Lane, Oregon Ciry, OR 97045 trar, 1021 Crestover Road, Wilmington, (5 03 ) 656-1575 DE 19803 OCTOBER 27-29 American Camellia Society Annual Fall OCTOBER 1 OCTOBER 13-14 Meeting and Show New York Botanic.. 1 Garden Symposium: Longwood Gardens Conference: "Solar Longwood Gardens, Kennett Square, Pennsyl­ "The New Perennials" Greenhouses-The State of the Art" vanI a Auditorium, New York Botanical Garden, Longwood Gardens, Kennett Square, Pennsyl- Show Hours: Thursday 1 :00 p.m. to 4 p.m. Bronx, New York vani a In formation: Show-Dr. Arthur Maryott, Hours: 8:3 0 a.m. to 5:00 p.m. Admission: $75 (pre-registration onl y) 4404 Maple Ave., Bethesda, MD 20814 Information: Ms. Cindee Howard, M.B.A., Information: Continuing Education, Long­ (301) 654-5727; Meeting-American Ca­ Assistant to the Director of Education, The wood Gardens, Kennett Square, PA 19348, mellia Sociery, P.O. Box 1217, Fort Valley, New York Botanical Garden, Bronx, NY (215) 388-6741, ext. 516 GA 31030, (912) 967-2358 10458, (21 2) 220-8747 OCTOBER 13-16 OCTOBER 27-29 OCTOBER 1-2 Garden Writers Association of America 35th Fourth Annual Restoring Southern Gardens Ohio Gourd Sociery 21st Annual Fall Show Annual Meeting and Landscapes Conference Morrow Counry Fairgrounds, Mount Gilead, Willi amsburg, Virginia Old Salem, Winston-Salem, North Carolina Ohio In fo rmati on: Susan Bruno, Colonial Wi lli ams­ Information: JoAnn Grote, R.S.G.L., Regis- Information: o.c Stevens, Show Chairman, burg Foundation, P.O. Drawer C, Wil­ trar, Old Salem, Drawer F, Salem Station, Mount Gilead, OH 43 338 liamsburg, VA 23187, (804) 229-1000 Winston-Salem, NC 27108, (919) 723-3688 OCTOBER 3-14 OCTOBER 14-16 AHS Autumn Tour of New England Rhododendron Species Foundation Fall OCTOBER 27-29 Information: Call or write the Sociery's De- Foliage Festival Holly Sociery of America Annual Meeting partment of Education Federal Way, Washington The Holiday Inn, Annapolis, Maryland Hours: 10 a.m. to 5 p.m. Information: The Holly Sociery of America, Information: Rhododendron Species Founda­ 304 North Wind Road, Baltimore, MD OCTOBER 5-8 tion, P.O. Box 3798, Federal Way, WA 21204 International Festival of Flowers 98003, (206) 927-6960, 838-4646 The Cathedral Church of St. John The Di­ OCTOBER 29 vine, 1047 Amsterdam Avenue at 112th Smithsonian Institution Seminar: "The Great Street, New York, New York OCTOBER 15-23 Gardens Exchange: Horticulture in America, Information: International Design Sympo- Fall Flower Show England, and France 1750-1830" sium, P.O. Box 263, Westwood, MA Planting Fields Arboretum, Oyster Bay, New Carmichael Auditorium, National Museum of 02090 York Admission: $3 per person American History, 14th Street and Consti­ Information: Planting Fields Arboretum, P.O. tution Avenue, N.W., Washington, D.C OCTOBER 7-9 Admission: $40 (Resident Associates), $50 Virginia Wildflower Preservation Society Box 58, Oyster Bay, NY 11771, (nonmembers) Study Weekend (516) 922-9201 Information: Resident Associate Office, A & To be held in various locations throughout I, Room 1271, Smithsonian Institution, Northern Virginia OCTOBER 21-22 Washington, D.C 20560, (202) 357-3030 Information: Mary Painter, 3718 Camelot Connecticut Arboretum Conference: Drive, Annandale, VA 22003, "Environmental Preference and Landscape OCTOBER 29-30 (703) 573-7747 Management" Connecticut College, New London, Potomac Chrysanthemum Society Annual Show OCTOBER 9 Connecticut Information: Professor Sally Taylor, Connect­ Wheaton Plaza Mall, Wheaton, Maryland American Horticultural Sociery Fall Festival Information: Dr. Robert Howell, 11214 River Farm, Mt. Vernon, VA 22121 icut College, New London, CT, Emack Road, Beltsville, MD 20705 Hours: 11 a.m. to 4 p.m. (2 03 ) 447-1911, ext. 7275 Entry Fee: $2 per person NOVEMBER 1-24 Information: Call or write the Sociery's De­ OCTOBER 22-23 AHS Tour of Japan, Taiwan and Hong Kong partment of Education Second International Chrysanthemum Show Information: Call or write the Sociery's De- and 40th Annual National Chrysanthemum partment of Education OCTOBER 11-14 Show and Meeting Garden Club of America Fall Flower Show: Long Island Marriott Hotel, Uniondale, Long NOVEMBER 9-11 "Autumn in the Atrium" Island, New York National Agricultural Career Show and Citicorp Center, 153 East 53rd Street, New Hours: Saturday 1 to 6 p.m. , Sunday noon to 56th National Future Farmers of America York, New York 5 p.m. Convention Information: The Garden Club of America, Information: Henry Fieldman, Publiciry, 16 Kansas Ciry, Missouri 598 Madison Avenue, New York, NY Sycamore Lane, Roslyn Heights, NY Information: National FFA Center, P.O. Box 10022, (212) 753-8287 11577, (516) 621-4851 15159, Alexandria, VA 22309

AMERICAN HORTlCULTURIST • 7 Weevil-Resistant Rhododendrons for Gardeners Several species of Rhododendron are ( resistant to attack by weevils. In fact, four species are rated by the Western Washington Research and Extension Center in Puyallup, Wash­ ington as 100 percent resistant: R. heliolepis, R. impeditum, R. scintil­ lans and R. burmanicum. Nine other species are rated above 90 percent resistant: R. dauricum, R. intrica­ tum, R. minus, R. desquamatum, R. ferrugineum, R. hemsleyanum, R. cuneatum, R. fastigiatum and R. yakusimanum. Cultivars are generally less resis­ tant, and only one was rated as 100 percent resistant-'P. J. Mezzitt' or 'P.J.M.'. Eleven other cultivars rated above 80 percent resistant: 'Jock', 'Sapphire', 'Rose Elf', 'Cilpimense', 'Lucky Strike', 'Exbury Naomi', 'Virginia Richards', 'Cowslip', 'Lus­ combei', 'Vanessa' and 'Oceanlake'. For a complete list of weevil-re­ sistant rhododendrons and a copy of an article on weevil control in rho­ dodendrons, please send a self-ad­ dressed, stamped, business-sized en­ velope to Assistants to the Editor, American Horticultural Society, P.O. Box 0105, Mount Vernon, VA 22121.

Secret to Weevil-Resistant Rhododendrons Unlocked

Scientists have discovered why cer­ bearing rhododendrons, called lepi­ tify terpenes will help breeders iden­ tain species of rhododendrons are dotes, cannot be crossed with the tify new seedlings that should be resistant to attack by weevils, and species that do not bear scales (ele­ resistant to weevils. -Agricultural their discovery promises to playa pidotes). Nevertheless, tests to iden- Research, December 1982 major role in weevil control pro­ grams for all plants. Agricultural Research Service plant physiologists at the University New Nursery Source Manual Published of Washington in Seattle found that weevil-resistant rhododendrons have Gardeners will appreciate the Brook­ retail and wholesale sources for each scales on their leaves that produce lyn Botanic Garden's new Nursery plant. In many cases, specific culti­ volatile chemical compounds called Source Manual, a handy guide to vars or varieties are recommended. terpenes. Since terpenes still act as a mail-order sources for 1,300 trees Also included are tips for buying strong weevil repellent even when and shrubs for the garden. trees and shrubs, information on im­ they are extracted from leaves, sci­ Plants in the 88-page manual are porting plants from overseas and entists hope to develop slow-release grouped under such categories as scientific and common name formulations that could be sprayed flowering trees, dwarf conifers, indexes. on plants as biological repellents. shrubs planted for foliage and fruit, To purchase a copy of the Nurs­ Adult weevils feed on foliage, where flowering shrubs and evergreen ery Source Manual, send $2.85, in­ they can cause unsightly damage, trees. A brief description of each cluding postage and handling, to while the root-eating larva can seri­ species and their special attributes or Brooklyn Botanic Garden, 1000 ously damage pot-grown plants. problems (when applicable) are Washington Avenue, Brooklyn, NY Unfortunately, resistant, scale- given, in addition to a list of both 11225.

8 • SEPTEMBER 1983 rqRiERqiRDEN$1 Sphagnum Moss: I ..-: ~, ., ,. I Health Hazard? I '. , - I Gardeners should be aware of possi­ I I BAYLISS AUTOVENTS ble exposure to a potentially serious I I fungal disease called sporotrichosis, which can be contracted by handling I Justly Famous For I sphagnum moss. The fungus that causes this lymphatic disease, Sporo­ : Rhododendrons : trichum schenckii, can be found in I Azaleas I soil and also occurs in the sphag­ I Japanese Maples I num moss used to pack seedling Dwarf Conifers Models for GREENHOUSES. COLDFRAMES and trees for shipment. It is found I Bonsai Materials I now SKYLIGHTS & SOLAR INSTALLATIONS. throughout the United States, but FEATURES I Flowering Trees & Shrubs I appears to be most common in the • Fits most greenhouses I Rock Garden Plants I • Vertical or Horizontal vents Midwest. • No electricity. SOLAR POWERED The fungus enters the body I Good selection of I • You select Opening Temperature through a small cut or scratch in the I unusual Horticulture Books - I • Corrosion resistant materials skin. According to Darroll D. Skill­ • Durable - Sample tested to 50 years of ing, principal plant pathologist at normal use. I Color catalog describes, prices over I ---OUR GUARANTEE-­ the North Carolina Forest Experi­ 2000 plants. Widely recognized as a I Our openers will open wider. faster. smoother. • va luable reference book. $2. 00. ment Station, " In one to four weeks, I I and more firmly while lifting 11/z to 4 times the a small painless blister develops .... actual loads of other similar products. This blister becomes inflamed, and slowly enlarges. Other areas may be­ : WORLD WIDE SHIPPING : FREE INFORMATION or come infected as the fungus spreads dealer inquiries welcomed. through the lymph vessels .... If un­ I Dept AH 1280 Goodpasture Is. Rd. I. Superiorc!71u toven ts treated, the disease progresses slowly I1 ______Eugene, Oregon, 97401 _ 17422 La Mesa Lane to the bones, abdominal organs, and (503) 686-8266 J Huntington Beach. Ca . 92647 uninvolved skin. But diagnosed early, the disease can be adequately treated and is rarely fatal." Many doctors are unfamiliar with the dis­ ease, so delayed diagnosis is a problem. WATER-LILIES Skilling suggests that gardeners in your garden avoid handling trees that have been packed in sphagnum moss; however, if they have no choice, he advises Lilypons catalogue washing hands frequently and treat­ features everything ing cuts and scrapes promptly. needed for your -ALI, May 1983 garden pool, including the pool Interferon and Plant Viruses Lilypons Water Gardens Human interferon may be the anti­ viral substance of the future. Israeli Waterlilies, Lotus, Aquatic plants, Goldfish, Scavengers, scientists have found that a specific KOi Fiberglass garden pools, PVC pool1iners, Sweeps, type of human interferon can reduce Filters, Pumps, Lights, Statuary, Books and much more. the multiplication of mosaic virus in tobacco. If further research confirms New colorful Lilypons catalogue and seasonal mini catalogs, $3.00. that interferon can prevent viruses I from reproducing in plants, the im­ LILYPONS WATER GARDENS (Please print) plications for agriculture, horticul­ I l 509 Arnhort Road 1509 LlIypons Road ture and the plant pesticide industry I .-\ddress.... Lllypons, " Iaryland 21717 Brookshire, Texas 77423 (30 l) 874-5133 (7 13 )934·8525 are enormous. I C ity_ -Penn State Horticultural Reviews, I State _ YES, Please send me the new color- April 1983 I ful Lilypons catalogue and seasonal I ______.... I______Zip - mini catalogs. I e nclose 83.00 .J

AMERICAN HORTICULTURIST • 9 AHS Best Sellers r For Holiday Giving Choose long-lasting gifts for Gardens Are for People. Japanese Gardens-Design your gardening friends from Thomas 0 Church. (Edited by Crace Hall and Meaning. our list of best-selling books and Michael Laurie.! McCraw-Hili Book Mitchell Bring and Josse Wayembergh . Companv. New York, New York. (2nd edi­ McCraw-Hili &ook Companv. New York, reviewed in American Horticul­ tion.! 1983. 256 pages; hardcover, $37.50.. New York. 1981. 214 pages; hardcover, turist. All available at a special AHS discount price, $31.50. including $27.50. AHS discount price, $23.25 in­ discount to AHS members. postage and handling. cluding postage and handling An updated edition of a classic work in Analyzes in detail 10 outstanding gardens Manual of Woody Plants_ landscape architecture that includes anel discusses the origins of the Oriental Michael A Dirr. Stipes Publishing Com­ Thomas Church 's thoughts on design garden design concepts. Chapters on pan v. Champaign, Illinois. (3rd edition.! principles All of the illustrations are new, Principles of Design and Construction 1983. 826 pages, softcover, $19.80.; hard­ and most of the gardens shown are ones Details as well as extensive garden plans cover, $2880. AHS discount prices, soft­ Church designed after 1955. Destined to and excellent photographs throughout cover, $17.85; hardcover, $2595 includ­ set new standards in the field of land­ ing postage and handling. scape architecture. This updated edition of a very useful The Complete Book of Roses. book includes 300 new species and 500 Cerd Kn]ssmann. Timber Press. Portland, new cultivars not found in earlier edi­ Oregon. 1981. 436 pages; hardcover, tions. There are also over 300 new line $50.00 AHS discount price, $4375 in­ Order Form drawings. Excellent information on size, cluding postage and handling hardiness, habit, growth rate, culture, Updated and translated from the original Prices reflect AMS Member Discount diseases, lanelscape value, cultivars and German edition of 1974, this is THE de­ and include postage and handling. propagation of each woody plant finitive study of the rose from prehistoric Gardens of a Golden times to 1981 . Describes each variety of Manual of Woody Plants rose, with information on the originator, o Hardcover $25.95 Afternoon. date of introduction and parentage of Jane Brown. Van Nostrand Reinhold. New [J Softcover $17.85 the hybrids Various rose-related topics o The Life and Travels of York, New York. 1982. 20.8 pages, hard­ include paleontology, mythology, com­ John Bartram $22.50 cover, $29.95. AHS discount price, $22.50. mercial production, propagation and including postage and handling. plant breeding. Includes rose species, old o Gardens of a Golden Tells the story of the gardens designed garden roses and modern hybrids Afternoon $22.50 jointly by Gertrude Jekyll and Edwin Lut­ o Japanese GardenS­ yens Beautifully illustrated with many The Life and Travels of John Design and Meaning $23.25 color photographs and details of garden Bartram. o Gardens Are for People $31 .50 design . Recommended reading for the The Complete Book of lover of English cottage gardens or for Edmund Berkeley and Dorothy Smith o $43.75 the garden history buff. Berkelev. University Presses of Florida. Roses Tallahassee, Florida. 1982. 376 pages; o Japanese Maples $30.89 A Dictionary of Botany. hardcover, $25. DO.. AHS discount price, o The Englishwoman's R. John Little and C Eugene Jones. Van $22.50. including postage and handling Garden $17.95 Nostrand Reinhold Companv. New York, A fascinating account of the life and o A Dictionary of Botany $16.05 New York. 1980. 40.0. pages; hardcover, travels of John Bartram, one of America 's foremost botanists and plant collectors. $18.50. AHS discount price, $16.0.5 in­ Enclosed is my check for __ books cluding postage and handling. His travels in search of plants took him to A botanical dictionary covering all aspects most parts of the eastern United States, in the amount of $ of the plant sciences. Indispensable to and his unusual plant collections had a the professional or the serious amateur profound influence on horticulture and Please allow six weeks for delivery. who makes frequent use of the litera­ botany in the eighteenth century. A book Discount price includes postage and ture. The perfect gift for the student of for all plant lovers. handling. Virginia reSidents add 4% botany or horticulture. The Englishwoman's Garden. sales tax. Japanese Maples. Alvilde Less-Milne and Rosemary Verey J. 0 Vertrees. Timber Press. Forest (editors). Merrimack Book Service. Salem, Mail to: Deborah Harpster, American Crove, Oregon. 1978. 178 pages; hard­ New Hampshire. 1980.. 156 pages; hard­ Horticultural SOCiety, P.O . Box 0105, cover, $39.50. AHS discount price, $30.89 cover, $2495 AHS discount, $17.95 in­ Mount Vernon, VA 22121. including postage and handling cluding postage and handling An authoritative work on a group of The story of 36 English gardens as told Ship to:______plants with tremendous variety-Japa­ by their owners, including plant likes and nese maples Describes and illustrates the dislikes, climatic and architectural prob­ Street: ______more than 250 cultivars of Acer palma­ lems, gardening practices and the history tum, plus many other species of Acer of each garden. Describes many gardens City: ______found in Japan Enjoyable reading and developed or rejuvenated since World beautifully illustrated. War II . A truly inspirational work. State: ______Zip, _____ PLANT New Pest Menaces Old Garden Reliable EXTINCTION

A Global Crisis by Dr. Harold Koopowitz and Hilary Kaye 256 pages, illustrated, $18.95. AHS discount price $15.00 including postage and handling. This is the most Significant period of plant destruction in the history of the planet! Plants are currently becoming extinct at a rate of nearly two species per day. More species of higher plants become extinct in a single year than all the higher animals lost since 1500 AD. PLANT Honeysuckle aphids ca use witches-brooms to form on the tips of branches. EXTINCTION is the first book to address this grave crisis . The bush honeysuckle, Lonicera ta­ or virus. So far, however, there is no tarica, is probably the last plant a evidence to support this theory. • Keys to feeding the world, healing millions, boundless fibers and fuel, gardener would expect to be threat­ The honeysuckle aphid appeared genetic engineering. ened by pests, but a species of aphid in Canada about eight years ago, • Plant politics, creatiNg your own that is relatively new in this country and was discovered in Chicago area gene bank, pragmatic conservation. is threatening the survival of this old gardens only four years ago. Central • Introduction by Dr. Gilbert Daniels, garden reliable. Bush honeysuckle and eastern European as well as American Horticultural Society. has always been prone to occasional English gardeners have been bedev­ attention from aphids; however, the illed by the pest for years. Although At your bookstore, phone your order brownish-green honeysuckle aphid, the U.S.D.A. reports some outbreaks to (717) 234-5041 , or send this Hyadaphis tartaricae, can seriously of honeysuckle aphids in the North­ coupon to our distributor: damage and even kill these sturdy east, so far the plague has been con­ plants. fined mostly to the north-central Please rush me __copies of PLANT What makes the honeysuckle states. EXTINCTION: A Global Crisis at $15.00 aphid so difficult to control is that it Systemic pesticides such as Meta­ each, postpaid, to the following mailing folds itself in the new leaves at the Systox Rand Ortho's Orthene® address. branch tips, where it is protected Systemic are effective controls but Name ______from ladybird beetles and garden less than satisfactory because of the sprays. Other aphids know the trick danger they pose to berry-eating Address ______of folding themselves in leaves, but birds. Follow directions on the label, City ______from these sanctuaries the honey­ but avoid spraying during flowering suckle aphid triggers the for­ and after fruit has formed to protect State/ZIP ______mation of witches-brooms- abnor­ bees and birds. o Check enclosed mal clusters of weak, twiggy growth Cultural controls for this pest in­ generally found at the branch ends. clude cutting and destroying the o VISA/MasterCard exp ____ Death spreads down the stem from witches-brooms- aphids apparently Account# ______the cluster and eventually, as the overwinter in them- and disposing clusters increase in number, over­ of any clippings and old leaves Signature ______takes the whole shrub. Department around the bushes, as they cat} be a Deborah Harpster of Agriculture scientists and chemi­ source of reinfestation. American Horticultural Society cal industry investigators think these Box 0105, Mt. Vernon, VA 22121 particular aphids may carry a fungus -Phil Clark

AMERICAN HORTICULTURIST • 11 HORTICUInJRAL Disease-Resistant CrabApples for Gardens EXPlORATIONS Gardeners who are planning to showy white flowers. The orange­ plant a crab apple this fall should red fruit lasts until Christl11as. consider one or more of the follow­ 'Robinson'-Recommended for its ing cultivars recommended by the single, deep pink flowers and dark University of Missouri Cooperative green foliage with red veins that give Extension Service. All exhibit resis­ the foliage a purple cast. 'Robinson' tance to apple scab, fire blight, pow­ is also disease-resistant and an excel­ dery mildew and cedar-apple rust. lent plant to consider. 'Adams'-A rounded, dense tree Malus sargentii 'Tina'- A dwarf with clusters of vivid red buds. Sin­ cultivar of M. sargentii. This plant gle, I1f2-inch flowers turn pink with bears bright red buds that open into age. The red 5jg-inch fruit turns red pure white single flowers. The bright in July and remains on the tree until yellow pollen is also attractive. spring. 'Adams' is slightly suscepti­ ble to powdery mildew. -Horticulture Research and Information Report, 'Candied Apple'-A weeping crab September 30, 1982 with red buds and single pink flow­ Fall Orient ers. The heavily textured leaves are November 1-24 dark green with a red overcast. Bright, cherry-red, 5jg-inch fruit Where but in Japan can you find a hangs on the tree into December. Prize Mums country that offers the fascination of an Eastern culture combined with Only slightly susceptible to apple Recommended modern comforts, food, hospitality, scab, this cultivar is a good substi­ tute for the disease-prone 'Red horticultural skills and beauty? The National Chrysanthemum Soci­ Jade'. Japan's other attributes include clean­ ety has just published a new "Best liness, courtesy and craftsmanship. 'Dolgo'-An old, frequently Mums for Your Garden" list, and Enjoy all this and more on the planted cultivar that is only slightly American Horticultural Society's Fall chrysanthemum fanciers should be susceptible to apple scab and fire sure to add several of the following Orient Exploration. The autumn blight. months are climatically the finest pe­ cultivars to their gardens this fall or riod of the year to visit this area. 'Donald Wyman'-A compact, next spring. The list was tabulated Our visits to private homes in rounded tree with dark green foliage from the Society's 1979-1983 show Japan are the unique part of and pink buds that open into single, records, and includes the cultivars this itinerary. National Culture Day, white 13f4-inch flowers. The bright that won the most Best of Show Japanese weddings, a visit to a silk red, 3f4-inch fruit is produced in awards. 'Yellow Knight' placed first museum and wood block print studio great abundance. 'Donald Wyman' also show us their amazing culture. for a second year in a row, followed is only slightly susceptible to pow­ by 'Snowball', 'Escapade', 'Taiho The magnificent garden temples of dery mildew. Kyoto, a village of bonsai nurseries, a Ginka', 'Royal Touch', 'Mountain ride on the "bullet train," a view of 'Henningi'-An attractive, up­ Snow', 'Romance', 'Megumi', Mt. Fuji, a drive on the 48 hairpin right, spreading tree with shiny fo­ 'Maiko', 'Dusky Queen' and the curves up to beautiful Nikko-all liage and abundant white flowers. 'Daphne' cultivars. The Society has these are part of the marvelous coun­ 'Henry Kohankie'-A rounded also published a list of recom­ try of Japan. tree bearing pale pink buds that mended small-flowered cultivars that We will travel on to the Republic open into single, I1f2-inch, pinkish­ are used for chrysanthemum trees, of China to experience the tradition white or white flowers. The glossy, cascades, hanging b?skets and pot of Old China, including the National red fruit is attractive throughout the Palace Museum's art treasures. The specimens. Topping the list is 'Sei­ last few days are in the hub of the winter. zan', followed by 'Megumi', 'Hana Far East-Hong Kong. This explora­ 'Indian Summer'-A rose-red­ No Yume', 'Yellow Daphne', tion will be conducted by a U.S. es­ flowered cultivar with attractive fall 'Maiko' and 'Hatsune'. cort with the assistance of local color and 5/8- to 3f4-inch fruit that Chrysanthemums are available guides and interpreters. turns bright red in mid-August. This from the following sources: Huff's Other horticultural explorations cultivar deserves more attention. Garden Mums, 710 Juniatta, Box available in 1983 are: Fall England 'Liset'-Another rose-red-flowered 187, Burlington, KS 66839; Dooley (Oct. 3-14), Fall Germany (Sept. 6- 20), Fall New England (Sept. 26-0ct. cultivar that bears glossy, dark crim­ Gardens, Route 1, Hutchison, MN 10), and South Africa (Sept. 9-30). son or maroon fruit 5jg inches 55350; Sunnyslope Gardens, 8638 For any of these programs, please across. It is slightly resistant to fire Huntington Drive, San Gabriel, CA write for your free brochure to blight and moderately resistant to 91775; King's Chrysanthemums, Carolyn A. Hottle, American Horti­ powdery mildew. P.O. Box 368, Clements, CA 95227. cultural Society, P.O. Box 0105, Mt. 'Professor Springer'- A plant with - The Chrysanthemum, Vernon, VA 22121. Or telephone abundant pink buds that open into June 1983 1-703-768-5700.

12 • SEPTEMBER 1983 GARDENERS MARKEI'PIACE The New AUSTRALIAN WILDFLOWER SEEDS DRIED FLOWERS SO NATURAL THEY Perennials Rare, selective, collection. 200 species of bril- LOOK FRESH ! Show & Tell Books: "STEP BY liant, AUSTRALIAN WILDFLOWERS. Plant- STEP BOOK OF PRESERVED FLOWERS," 3rd. ing guide with order. Books availabl e. Send two Ed. 48 pg. includes Microwave and 3 other drying International Postal Reply Coupons for descrip- methods fo.r 100 flowers, $2.95. "STEP BY STEP tive lists. BUSHLAND FLORA AUSTRALIAN BOOK OF DRIED BOUQUETS" 2nd Ed. 136 pg.; Williamsburg, Modern, Centerpieces-{)ver SEED SPECIALISTS. Box 118, Scarborough A symposium sponsored by 6019, Western Australia. 285 photos, color & black and white, $8.95. Add $1.00 shipping or both books $12.90 ppd. The New York Botanical Garden FREE newsletter, send stamp. ROBERTA THE AVANT GARDENER MOFFITT, Box 3597, Wilmington, DE 19807. " DIFFERENT, EXCITING, GREAT FUN TO SAMPLE-NEWSLETTER, Exotic Fruit Vege- READ-for the gardener who wants to get more Program tables, $1.00. SASE. MARIAN VAN ATTA, out of gardening!" Subscribe to THE AVANT 398AH Dayton Boulevard, Melbourne, FL GARDENER, the most useful, most quoted of 32901. all gardening publications. Every month this unique news service brings you the newest and Horticultural and Botanical Books Bought and • Designing with Perennials most practical on-going gardening informa- Sold. Current Sa le Catalogue, over 1,000 Titles, Frederick McGourty tion-new plants, products, techniques, with $1.00. POMONA BOOKS, Rockton, Ontario, sources for every item, plus feature articles, spe- Canada, LOR IXO. cial issues. Now in its 14th year. Awarded the EXOTICA 4, enlarged to 16,300 photos, by Dr. • Perennials in the Shrub Garden Garden Club of America Medal for outstanding A.B. Graf; 2,590 pages in 2 vo lu mes, $175. achievement in horticulture. Special to new sub- TROPICA-7,000 color photos of exotic plants Pamela Ha rrer scribers, $10 for a full year. Sample copy $1. and trees, $115. EXOTIC PLANT MANUAL- THE AVANT GARDENER, Box 489M, New 4,200 photos, $3 7 .50. EXOTIC HOUSE York, NY 10028. PLANTS-1 ,200 photos, $8.95. Circulars gladly • Low-Maintenance Perennials sent. ROEHRS, Box 125, E. Rutherford, NJ Roher! Hehh AZALEAS & RHODODENDRONS 07073. SPECIALIZING IN THE UNUSUAL ... Dwarf BRITISH TEAK GARDEN SEATS Rhododendrons, Evergreen and Deciduous Solid Teakwood Garden Seats-featured in the Azaleas, Dwarf Conifers, Companion Plants ... • Color without Flowers aboretums & gardens of England. The perfect Catalog $1.00 (Refundable). THE CUMMINS Pamcia Harrer heirloom gift for church, park or private garden. GARDEN, 22 Robertsville Rd., Marlboro, NJ Send $1.00 (deductible) for color catalogue and 07746. (201 ) 536-2591. current price list. COUNTRY CASUAL, 17317 • Successful Plant Combinations BAMBOO-AVREA-SULCHEA Germantown Road, Germantown, MD 20874. (301) 428-3434. Frederick McGourty Beautiful, hardy specimens. No delivery. J. NICHOLSON, 7207 Bellona Avenue, Balti- BROMELIADS more, MD 21212 (301) 377-7480. DECORATIVE BROMELIADS at reasonable prices. 21 page DESCRIPTIVE LIST $1.50. Also • Out-of-Season Perennials BEGONIAS 80 page booklet BROMELIADS FOR MOD- Pamela Harrer BEGONIAS: THE COMPLETE REFERENCE ERN LIVING with 135 color photos, $5.00 GUIDE, by Mildred 1. and Edward J. Thomp- for both. THE BROMELIAD TREASURY, 639 son. 384 pages, 850 illustrations (165 in color). Bend Drive, Sunnyvale, CA 94087. Culture, classification, and history. $25.00 (jacket • Long-Season Perennials THE BUSINESS OF HERBS price $37.50) for a limited time only. (shipping Frederick McGourty included in U.S. ).To order autographed copies, THE BU$INESS OF HERBS is the only news- write The Thompsons, PO Drawer PP, Sou- letter in the U.S. catering to herb business needs. thampton, NY 11968. Enclose a check for $25.00 Trade news, marketing, techniques, stlppliers, or use your Master Charge or Visa card. resources. For sample copy send $1.00. PO Box Saturday, October I, 1983 559, Madison, VA 22727. BOOK SEARCH SERVICE 8:30 a.m. - 5:00 p.m. CACTI & SUCCULENTS Send your list of wanted gardening books. I'll Cactus Wholesale-Special Price $25.00. 100 try to find them. No obligation. (Out-of-print, blooming size. DESERT PLANT CO. Price list The New York Botanical Garden hard-to-find, antiquarian.) EDWARD F. SMI- FREE. P.O. Box 880, Marfa, TX 79843. Bronx, NY 10458 (212) 220-8747 LEY, BOOKSELLER, RFD 5, 43 Liberry Hill Road, Bedford, NH 03102. CARNIVOROUS PLANTS Carnivorous, woodland terrarium plants and BOOKS supplies. Book, The World of Carnivorous Plants, o Please send me a brochure about Just released in 1983! GREENHOUSE MAN- $6.95 postpaid. Illustrated catalog 25 ¢, PETER The New Perennials symposium AGEMENT-SECOND EDITION by Robert W. PAULS NURSERIES, Canandaigua, NY 14424. Langhans, Cornell University Floriculture Pro- Name fessor for 25 years. Valuable information on summer cooling, winter heating and ventilation. TREE PEONIES Address Benches, containers, fertilizers, watering, pest CHINESE CONQUEST control and supplementary lighting are also dis- Blue and green flowers plus many unusual specimens from cussed. 270 pages with over 100 illustrations. Chinese dynasties never seen before. Send $2.00 for Chinese catalog and new 1983-1984 all other F,eonies catalo!r-credited Return to: Symposium, Education Send $21.00 postpaid to HALCYON PRESS on first order. Also AMARYLLIS cata og . OF ITHACA, 111 Halcyon Hill Road, Ithaca, SMIRNOW and SON Department, The New York NY 14850. Route #1, Huntington, NY 11743 Botanical Garden, Bronx, NY 10458

AMERICAN HORTICULTURIST. 13 CATALOGS HOUSE PLANT ACCESSORIES AND "FREE CATALOGUE" ... LOWEST PRICES SUPPLIES EVER-TOP QUALITY SUPPLIES ... Plastic Send legal size stamped envelope for catalog. pots, hanging baskets and much more. SAVE! FLORA AD ASTRA, Route 1, Box 333-A-2, PLANT COLLECTIBLES, 103E Kenview Av­ Monticello, GA 31064. enue, Buffalo, NY 14217. HOUSE PLANTS CLOTHING ORCHIDS, GESNERIADS, BEGONIAS, CACTI LEE Jeans. Factory outlet work clothes, shoes. & SUCCULENTS. Visitors welcome. 1982-83 Bargains on new shirts (low as $5.95), jackets, Reach the single most Catalog $1.25. LAURA Y OF SALISBURY, Rt. boots, gloves, coveralls. Send $1 for catalog. devoted group of gar­ 41 (Undermountain Rd.) , Salisbury, CT 06068 SARA GLOVE COMPANY, 16 Cherry Ave., (203) 435-2263. Dept. C-131, Waterbury, CT 06704. deners in the country by INVENTIONS WANTED COMPOST BAGS advertising in our classi­ Inventions, ideas, new products wanted for 'POST HASTE compo sting bags let you have fied section presentation to industry and exhibition at na­ useable compost in two weeks. Made from tional technology exposition. Call 1-800-528- DuPont's "Tyvek," 'POST HASTE bags hold 6050. Arizona 1-800-352"0458. X831. in heat but let air circulate and excess moisture Classified Ad Rates: escape. 1 bag, $2.95; 5 bags, $9.95; 10 for 50¢ per word; $10.00 MAPLES $17.95, from FORENCO, Dept. A, PO Box Matsu-Momiji Nursery-Rare & Unusual Ma­ 9088, Wilmington, DE 19809. minimum per insertion ples + Pines. New descriptive catalog $1 (re­ fundable) PO Box 11414, Philadelphia, PA 19111 DWARF CONIFERS Copy must be received two (215 ) 722-6286. Over 170 rypes of dwarf conifers described by months prior to publiccr size, shape, color and texture. Many rypes suit­ tion date. Send orders to MINIATURE ROSES able for Bonsai. 50 page catalog $1.00 (refund­ Choice windowsill plant! Blooms constantly! able). Botanic Plant List FREE. WASHING­ the attention of Cindy (Over 300 varieties) guaranteed safe delivery­ TON EVERGREEN NURSERY, Box 388AH, Weakland, American Horti­ year 'round. Canada, U.S.A. Collector's cata­ L~icester, NC 28748. (704) 683-4518. cultural Society. Box 0105, logue $1.00. Send Today! MINIATURE PLANT WORLD, Box 7 A, Sardis, B.C., Canada, VOX FLOWER ARRANGING SUPPLIES Mt Vernon, VA 22121. 1YO. Carefully selected supplies, equipment and ac­ Or call (703) 768-5700. cessories for flower arranging, corsages, house­ ORClllDS plants. Illustrated catalog 25 ¢. Retailers us~ let­ ORCHIDS! ORCHIDS! ORCHIDS! Brome­ terhead. DOROTHY BIDDLE SERVICE, GMl, Payment for all classified liads, Staghorn Ferns, Books, Peters Fertilizer, Greeley, PA 18425-9799. advertisements must be Potting Mixes, Supplies for indoor and green­ house culture. REQUEST CATALOG. fOX / FREE CATALOG. Flower arranging supplies. made in advance. All copy ORCHIDS, INC., 6615 West Markham, Little Low prices. Wide selection tools, wire, foams, subject to the approval of Rock, AR 72205. frogs, vases, drieds. FLOWER DESIGNER'S BENCH, Box 839 AH, Auburn, NY 13021. the Society. PERENNIALS HARDY PERENNIALS, herbs, wildflowers. FRAGRANCE Strong plants, reasonable prices. Descriptive SEEDS FOR FRAGRANCE, herbs, and the catalog $1.00. SEXTON NURSERY, 23340 English Flower Garden. Catalogue $1. THE Doane Cr. Rd. AH, Sheridan, OR 97378. FRAGRANT PATH, Box 328, Fort Calhoun, HARPER HORTICULTURAL SLIDE NE 68023. LIBRARY (PAMELA HARPER). PLANT DIARY We supply many of the pictures in American For indoors. Organized space for all your in­ GARDEN IMPROVEMENT Horticulturist. Over 50,000 slides of plants and formation about growth needs and activiry of * * A * * gardens available. Duplicat~s $2.00. Lecture sets 20 individual plants. Special columns for feed­ TWO FREE REPORTS: "Grow a Better Gar­ on many topics $25.00 rental. 1983 catalogue ing schedules. Ideal to leave with plant "sitter." den!" and "How to Make Faster Compost!" $1.50.219 Robanna Shores, Seaford, VA 23696 $2.95 THE IDEA GROUP, Box 622, No. Bran­ .. . LIFESCI, PO Box 276AA, Waldwick, NJ (804-898-6453). ford, CT 06471. 07463. HORTICULTURAL GIFTS PLANT PROTECTION GREENHOUSE ACCESSORIES "HORTICULTURAL TREASURES "-A stun­ Fortify your plants now with Wintercare Plant COMPLETE MIST PROPAGATION SYS­ ning catalog collection of juried gifts for men Food-Plant Protectant. Roses, rhodys, hollies, TEMS. Get phenomenal propagation results­ and women who garden. Specialry hand tools, more . .. 5 Ibs-$12.98 postpaid. Send check Greater financial yield! Unequalled-inexpen­ solid teak British garden seats, Colonial sryle to WINTERCARE HORTICULTURAL sive- FREE BROCHURE. AQUAMONITOR, oak hayforks, traditional egg baskets, pot pourri PRODUCTS, Inc. 16 Summit Cr. Oyster Bay, Box 327-B Huntington, NY 11743. cottages, antique doll sawdust ornaments, gold NY 11771. floral jewlery-pins, tie tacks, cuff links, floral PHALAENOPSIS (MOTH) ORCHIDS GREENHOUSE GROWING screenprints, guill art florals, lace impressed Blooming size, values to $20.00. Minimum or­ Hard-to-find hobby, greenhouse equipment and stoneware wall basket filled with a Williams­ der 3 plants, $9.50 each, postpaid. Catalog $1.00, supplies. Ul'lique Catalog. $2.00, refundable. burg sryle floral bouquet, and mor~. Free cat­ credited on first order. GREEN VALLEY OR­ CHARLEY'S GREENHOUSE, 12815-AH alog-Country Casual "Horticultural Treas­ CHIDS, RT 1, Box 233S, Folsom, LA 70437. Northeast 124th Street, .Kirkland, WA 98033. ures," 17317 Germantown Rd., Germantown, MD 20874. (301) 428-3434. (504) 796-5785. GREENHOUSES HOSTAS PLANTERS 8 ft (L), 4% ft (W), 6% ft (H), $69.95. Larger Specializing in the classic varieties: Catalog 50¢. ATTRACTIVE, FUNCTIONAL, easily built. model available. FREE information. Write: HOMESTEAD DIVISION of SUNNYBROOK Gr~at for displaying your indoor gard~n . For SOLARLITE GREENHOUSE, 6938B Foothill FARMS NURSERY (Plant specialists since 1928), detailed plans, send $2.00 SASE to LEDGE­ Blvd . Tujunga, CA 91042. 9448 Mayfield Rd. , Chesterland, OH 44026. WORKS, Box 425c, Shelburne Falls, MA 01370.

14 • SEPTEMBER 1983 PLANTS-RARE BUT AFFORDABLE 0/ tHe Extensive selection: • American Natives " Out­ ~&(lYt oricl1~ standing Ornamentals • Uncommon Conifers • Wild Fruit ' Hardiest Eu ca lyptus' Wildlife Plants * . Affordable containerized starter-plants. Informative catalog-$1.50. FORESTFARM, FREE! Howtogetea& 990 Tetherah, Williams , OR 97544. ily the highest survival of ---- RHODODENDRONS & AZALEAS new plants faster with better RHODODEN DRONS, AZALE AS. Special roots. Make more money. pl ants to accent special pl aces. Hardy classics, Discover now a proven new introdu cti ons, exoti c indoor Malaysian Vireyas, Madderiis. Al so, compani on trees, mist system-the latest in shrubs and groundcovers. Catalog $2.00. THE reliable solid state feed­ BOVEES NURS ERY, 1737 A S.W. Coronado, back controls. You will love Portland, OR 97219. its simplicity. SEDUM-SEMPERVIVUM Treat your new plants with NEW SEDUM-SEMPERVIVUM 1983 Ca ta­ [)wllr! ~ltllpis 8xcc/sp log: 25 \1 ; Over 100 varieti es Sedum ; over 350 an amazing fog-like mist varieties sempervivum. Sampler co ll ecti ons: environmentthat gets phe­ Vrcclt altd Variegated varieties Sedum 8/$5.95 ; Sempervivum 8/$5.95. Order nominal results. both for $10.00 ppd. STANN LYMAN, AL­ KOBAN • DARUMA • TENZAN PINE GARDENS, Box 247AH, Dall as, OR 97338. UNEQUALLED KODARUMA • GYOKUHO

SEEDS INEXPENSIVE ZUlKONISHIKI • CHIYODAZURU Radiccho, arugul a, haricot vert, petit pois, blue GUARANTEED Sand $ 1 lor cataiog-$5 lor book tortilla corn, tomatillo, Asian pepper and many other gourmet and heirloom seeds. Write fo r FREE listing. LE MARCHE SEEDS INTER­ ~ NATIONAL, Dept. Y, PO Box 556, Dixon CA ~------I~I======~ 95620. L I SHAMROCKS I r~~s5121 ~~:,:,oEI~643·2061 - 643·581' Beautiful, deep green, typically shamrock fo li­ age in compact mounds, topped with white star­ like flowers that bloom continually during the growing period. (Oxalis regnellii) makes a beau­ tiful flo wering pot or basket pl ant. 12 bulbs $6.95 postpaid. Payment with order. Sorry no Award An AHS Medal At CODs. CURRAN L. GARRET, PO Box 337, Ingleside, TX 78362 (512) 776-7249. TREE PROBLEMS-BOTANICAL OR Your Next Plant Show LEGAL For Directory of members of the American So­ ciety of Consulting Arborists-the experts in tree care and appraisals for Legal marters, write: ASCA, 315(AH) Franklin Road, North Bruns­ wick, NJ 08902.

UNUSUAL INDOOR PLANTS Unusual Indoor Plants. 1,800 Varieties-Be­ gonias, Ferns, Geraniums, Herbs, Exotics. NEW 1982-84 catalog with more color $2.50. LOGEE'S GREENHOUSES, AH, 55 North Street, Danielson, CT 06239.

UNUSUAL PLANTS NEW! "PLANT OF THE MONTH CLUB" Beautiful, unusual, scarce, little-known plants. Easily grown, bloom INDOORS! NOW AVAILABLE! Large, stamped envelope, FREE The American Horticultural Society offers the Bole Memorial Medals, details. SUNSET, 4007 N . Elrod, Tampa, FL designed by Victor Schreckengost, a n~tionally known sculptor and industrial 33616. designer. These medals are awarded to individuals for horticultural excellence at regional shows put on by plant societies who are members of AHS . The WILDFLOWERS gold medal requires 15 species or cultivars of blue ribbon quality; the silver Beautiful Gardens are easy with Wildflowers medal 8 species or cultivars. These need not be all of the same species. The and Hardy Perennials. Husky field grown stock. medal measures one and a half inches across with a ring attached so it can be Write for FREE catalog filled with helpful cul­ worn on a chain or ribbon. The date and the recipient's name can be tural information. BOEI9.LKE'S WOODLAND engraved on the back. GARDENS, W140NI0829 Country Aire, Dept. Requests for applications, which must be made three months in advance of A, Germantown, WI 53022. the event, can be obtained from Mrs. Benjamin P. Bole, Jr., Chairman, 1 Bratenahl Place, Cleveland, OH 44108.

AMERICAN HORTICULTURIST . 15 New Children's Gardening Book Plants: Biological Parents, teachers and anyone work­ dren and young adults to the enjoy­ Prospectors? ing with children will want to pur­ able and educational features of gar­ chase the new publication by Gar­ dening. The projects range from Scientists can use trees and certain dens for AlllThe National "Grow Your Name on a Pumpkin" other plants to locate deposits t? Association for Gardening-The to "Making a Solar Food Dryer." At gold and other precious metals. Such Youth Gardening Book. The 145- the end of the book are several case metals, brought up from deepe de­ page book includes idea- and infor­ studies, a bibliog~aphy and an posits by way of ground water, are mation-filled chapters on planning, index. absorbed by plant root system(> and site development and soils, design To order a copy of The Youth c.an eventually be detected in plant and indoor gardening. In addition, Gardening Book send $8.95, includ­ tissue. the book includes a chapter describ­ ing postage and handling, to Gar­ Scientists at the U.S. Geological ing over 50 specific activities and dens for All, 180 Flynn Avenue, Survey burned plant samples in lab­ projects designed to introduce chil- Burlington, VT 05401. oratory ovens at temperatures high enough to destroy organic matter without altering the metal content. Samples of Douglas fir were found Rare Birch Given Second Chance to contain 14 parts per million (ppm) gold while samples of bear Forest ecologists at the Virginia populations in various national for­ grass from the test plots contained Polytechnic Institute have succeeded est areas. large amounts of molybdenum. One in propagating 80 seedlings of the The round-leaved birch, Betula sample contained 500 ppm, more rare Virginia round-leaf birch, a spe­ uber, has round instead of the ellipt­ than 20 times the normal level for cies thought to be extinct until re­ icalleaves common to the genus. It bear grass in the area. cently. A small stand of 12 trees was will grow only in areas where there The traces of metals found in this rediscovered growing in Virginia's is little competition from other study were not high enough to in­ Jefferson National Forest in 1975. plants, and is found in occasional spire mining operations, but the The species' chances for survival are sunny clearings in forests, such as study results suggest that plants and believed to be greatly enhanced by those resulting from the death of a trees may be used routinely as bio­ this effort, and scientists now plan large tree. logical prospectors in the future. to use the seedlings to establish new -American Forests, July 1983' -American Forests, July 1983

New Public Garden in Los Angeles Virginia Robinson Gardens, one of races with gravity-fed fountains and LuAnn Munns, Los Angeles County the oldest private estate gardens in a lush collection of palms and other Department of Arboreta and Botanic Beverly Hills, is the newest public subtropical plants. Gardens, 301 North Baldwin Ave­ botanical garden in Los Angeles The gardens are open to the pub­ nue, Arcadia, CA 91006, (213) 446- County, California. The six-acre lic for group tours by appointment 8251. -Garden Writers of America garden features a series of nine ter- only. For information call or write Bulletin, January-February, 1983

2ND CLASS POSTAGE }\\1ERICAN PAlO AT ALEXANDRIA, VA - RORfICULTlIRIST AND AT ADDITIONAL MAILING OFFI CES P.O. Box 0105, Mount Vernon, VA 22121