Plant Life in the Worlds Mediterranean Climates
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gIVE THE GIFT THAT KEEPS ON IVING ... ~em.bership in the American Horticultural Society is the peryect gift for gardeners! Or treat yourself to gardening delights! Just look at a few of the AHS member benefits! The American Gardener Magazine Directory of Member Benefits Free Admission to Flower & Garden Shows Free Seed Exchange Educational Programs Admission to Botanical Gardens Horticultural Book Service Sign me (or my lucky recipient) up for membership. I am enclosing the membership dues. tll!~f Account # ___________----,'7- __ Exp. _____ MEMBER DUES: 0 $25 One Year 0 $45 Two Years (Save $5) (International members add $l0/year Jar postage) AMOUNT ENCLOSED: $ _______ Signature Please tell us how to sign the gift card and the approximate date it should arrive. Please tell us how to sign the giJt!card Cllld the approximate date it should arrive. Name ______ ______ Pholle __________ Name ____________ Phone __________ Address ___________ Clty ___________ Address ___________ CHy ___________ State _____ Zip ___ ____ Send renewal to: 0 me 0 recipient State _____ Zip _______ Selld renewal to: 0 me 0 recipient Pl ease tell us how to sign the giJt card and the approximate date it should arrive. Name ___________ Phone __________ Address ___ ____________________ Na me _____ _______ Phonc __________ City State __ Zip ____ _ Address ___________ Clty ___________ Staee __--=- __ Zip _______ Send renewal to: 0 lI1e 0 recipient AHS MEMBERS: Your member # is required to O 0 0 0 0 process any gift orders: '@'i",.1;jtrii§M"li""4·.C.1 AMERICAN HO RTI CULTURAL SOCIETY • 7931 East Boulevard Drive • Alexandria VA 22308-1300 I 9MAG co n t e n t s Volume 77, Number 6 November/December 1998 . ' .' Commentary 4 Conoph~ums n Members' Forum 5 by Steven A. Hammer Toyon) ipomopsis) and centaureas. See why these curious succulents from South Africa have some gardeners hooked on growing them. News from AHS 7 Youth garden symposium) Asian long-horned Stonescaping 28 beetles) franklinia) Fred Galle. by Richard L. Dub€ Used appropriately) stone can be an integral part Focus 10 of a dynamic) four-season landscape. Climate) weather, and the gardener. Marie Selby Botanical Gardens 34 Offshoots 15 by Molly Dean An ode to wheelbarrows. Home to a world-class collection of tropical and Mail-Order Explorer 16 subtropical plants) this popular botanical garden Plants for holiday gift-giving. in Sarasota) Florida) is also on the forefront offorest Gardeners Information Service 17 canopy research. Spaghetti squash) overwintering peonies in pots) Frances Tenenbaum 41 composting in winter. by Kathleen Fisher Conservationist's Notebook 18 An in-depth look at the editor who has guided some of Saving the Arizona cliffrose. toda/s most respected gardening writers into print. Natural Connections 20 Provenance 46 The secret lives of cicada-killer wasps. by Andy Wasowski Book Reviews 53 Before selecting a native plant for your garden) make Tropicals) North American trees) California ~ure it is genetically adapted to the climate and soil wildflowers) gardening ideas. zn your area. Regional Happenings 58 Academy Awards of Native Plants) titan arum. Hardiness and Heat Zones 64 On the cover: Branches ofpossumhaw (liex decidua) laden Pronunciations 65 with red winter berries. Only the f emale plants of this native 1998 Index 66 holly produce this brilliant display) which can last from October until March. Photograph by Roger Foley. American Horticultural Society 7931 East Boulevard D1"ive Alexandria, VA 22308-1300 (703) 768-5700 commentary lFlVlV. ahs. org ~ The American Horticultural Society (AHS) educates and inspins people nmost areas of the country, the garden is drifting of all ages to become successful into dormancy at this time of year. Some garden and environmentally responsible ers are barred from the soil by frost or snow; oth gardeners by advancing the art I and science of horticulture. ers have already completed their fall tasks and can rest on their laurels wltil spring. For many of us, ~ the garden is also upstaged by preparations for PRESIDENT/CEO spending time with friends and family at various LINDA D. HALLMAN holiday celebrations. But for those who just can't stay away from gar BOARD OF DIRECTORS Officers 1998-1999 dening, even in winter, there are countless con KAn'i)10SSWARNER,CHAIRMAN tainer plants that can occupy the dreary winter Lat" Bllena Vista, Florida days. In this issue we'll tell you about conophy NAt'lCY S. THOMAS,FlRST VICE CHAIRMAN turns, a little-known genus of miniscule succulents HOllston, Texas from southern Mrica. These stonelike plants are PAUL ECKE, JR.,SECOND VICE CHAIRMAN Encinitas, California easy to care for and reward their growers witll an WILLIAM A. PUSEY, SEORETARY astonishing display of daisylike flowers in late sum- Washi'!iJton, D.C. mer and fall. But beware of these little gems: Author Steven Hammer warns that CHARLES HENRY SMiTH jiR., TREASURER Middlcbu';g, Vi'lJi,,;a, "conos," as tlley are known to tlleir fans, can be habit-forming! Escaping the cold weatller for warm exotic destinations is a favorite pursuit of almost SHERMAN ADLER West Pa!;" Buuh, Florida everyone. For gardeners, what could be better tllaJl a trip to a subtropical botanical gar LM, BAKBRJR. den? We've provided you with a vicaJ'ious trip to Marie Selby Botanical Gardens in Flori Winston· Salem, North Caro/i1l" da, renowned for its lush tropical plaJltings as well as for its commitment to a variety of WILLIAM E. B.ARlUCK, PH,D, IMMEDIATE PAST CHAl:RlvIAN conservation aJld education programs, Pine MOttll,tain, Geo'flJia Another popular winter pastime for gardeners is poring through catalogs in search of SHIRLEY BARTLETT plants for the Spling garden. But after reacling Andy Wasowski's article on the importance Sa1lta Ba,'bara, Califo,."ia of selecting plants based on provenance-the geographic and climatic region in which KATHERINE MCKAY BELK Charlotte, North Ca.·olina tlley originated-you may want to rethink your choices to make sure you aJ'e picking JAMES L CO.R:FIELD plaJltS that are adapted to local growing conditions, Geneva, Illinois Many people also use winter as a time to see the "bones" oftlleir garden. One of the AlVlBELLA S, DANE Boston, Massachusetts most important aJld versatile structural elements in a gaJ'den is stone, which serves as a JOHN ALEX FLOYD JR, focal point, a framing element, aJld as a surface against which to display plants, In this Bi1'1}J,i1Whftln, Ala bama issue, laJldscape designer Richard Dube offers practical tips on how to integrate stone ef DOROTaY T. IRELAND Birminghaltn, Alabama fectively into your garden. WILLIAM R. .MARKEN Catching up on the latest and best gardening books is still a time-honored winter Los Altos, California pursuit, so be sure to read Kathleen Fisher's lively pom'ait of Frances Tenenbaum, one THEODORE R. MARSTON Kirkland, Washington of the dynamos oftlle garden book publishing world. Tenenbaum is editor of Boston GENE M, MILLER based Houghton Mifflin Company's acclaimed line of garden books and author of sev Silver Spr;,'i!, Mm'yla1ld eral books of her own. EGONMOLIlAK As you spend time witll your faJnily and friends this holiday season, I hope you will Seattle, Wllshi'!iJton DUDLEY MORGAN shaJ'e our magazine with them aJld encourage them to join the extended family ofmem NnshJlille, Tcu:nessee bers that make np tlle American Horticultural Society, We look forward to growing with GEOFFREY L RAUSCH all of yon in the New Year aJld beyond. Pittsbmlfh, Pennsyll JlJ.nin. VALERIE L THOMAS Alexa.1ldriaJ Virginia ROBERT D, VOLK San Marillo, California ~ PRESIDENT EMERITUS DR. H. MARC CATHEY - Linda D. Hallman, AHS President/CEO 4 THE AMERICAN GARDENER November/December 1998 THE AMERICAN members' GARDENER EDITOR DAVID J. ELLIS MANAGING EDITOR rum MARYYEE ASSISTANT EDITOR CHRISTINA M. SCOTI COMMUNICATIONS ASSISTANT MARK C. MOLLAN DESIGN AND ART DIRECJ'ION JOSEPH YACINSKJ DESIGN MEMBERSHIP DIRECTOR DARLENE OLIVER ~ EDITORIAL ADVISORY BOARD JOHN ALEX FLOYD JR., CHAlR Birmingham, Alabama NINA L. BASSUK Ithaca, New York RlCHARD E. BIR Brevard, North Carolina JOHN E. BRYAN Sausalito, California JOHN L. CREECH Hendersonville, North Carolina KEITH CROTZ Chillicothe, Illinois PAl.'lAYOTI KELAlDIS HETEROMELES ARBUTIFOLIA Once established, it can survive the dry Denver, Colorado It's tough, evergreen, drought tolerant, summers witl1little or no additional water. RICHARD W. LIGHTY flowers in springtime, produces abw1dant If grown, however, witl1 plants that need Greenville, Delaware red berries in auuunn, and is adaptable to watering in the summer, or if-as is the case ELVIN MCDONALD steep slopes. How could a dry-climate with one of my shrubs-it is placed too West Des Moines, Iowa Southern California gardener living at the near a sprinkler head, it still blooms, fruits, ~ bottom of a steep, south-facing slope not and grows-unlike some other native ADVERTISING AHS ADVERTISING OFFICE love this plant? Yet Heteromeles arbutifolia shrubs that can't tolerate water in summer. 4350 DiPaolo Center, Suite B offers even more-berries that make color A particularly grand specimen guards Glenview, IL 60025 ful cut sprigs for the holidays and provide tl1e bottom of my hillside, about 25 feet (847) 699-1707 • FAX: (847) 699-1703 food for wildlife. from my kitchen table. I admire me view COLOR SEPAMTIONS Commonly known as toyon or Califor through the glass windows and doors and FILM GRAPHICS nia holly, this shrub or small tree is a Cali watch the visiting birds pick its berries. I am PRINJ'ER fornia native that is naturally distributed in thankful that my plantings can feed the BANTA PUBLICATIONS GROUP chaparral, oak woodland, and mixed ever birds. I have never eaten tl1e berries, since The AmcnClw Gardener(ISSN 1087-9978) is published green forests.