I I I The NATIONAL HORTICULTURAL MAGAZINE JOURNAL OF THE AMERICAN HORTICULTURAL 80cmTY APRIL 1953 The American Horticultural Society, Inc. ROLL OF OFFICERS AND DIRECTORS OFFICERS President, Dr. Freeman Weiss, Washington, D. C. First Vice-President, Mr. John L. Creech, Glenn Dale, Md. Second Vice-President, Mrs. Robert Woods Bliss, Washington, D. C. Secretory, Dr. Francis de Vos, Washington, D. C. Treasurer, Miss Olive E. Weatherell, Olean, N. Y. Editor, Mr. B. Y. Morrison, Pass Christian, Miss. Assistant Editor, Mr. James R. Harlow, Washington, D. C. DIRECTORS Terms expiring 1954 Terms expiring 1953 Dr. Fred O. Coe, Bethesda, Md. Mr. Arnold Davis, Oeveland, Ohio Mrs. Walter Douglas, Chauncey, N. Y. Mrs. Mortimer J. Fox, Mt. Kisco, N. Y. Mrs. J. Norman Henry, Gladwyne, Pa. Mr. Frederic P. Lee, Bethesda, Md. Mr, Stuart Armstrong, Silver Spring, Md. Dr. David V. Lumsden, Chevy Chase, Md. Mrs. Arthur Hoyt Scott, Media, Pa. Dr. Donald Wyman, Jamaica Plain, Mass. HONORARY VICE-PRESIDENTS Mrs. Edna Korts, Pres., Mrs. Otto Zach, Pres., American Begonia Society, American Primrose Society, 3628 Revere Ave., 1172 S. E. 55th Ave., Los Angeles 39, Calif. Portland 15, Oreg. Mr. Calder W. Seibels, Mr. Harold Epstein, Pres., American Camellia Society, American Rock Garden Society, 800 Sweetbrier Rd., 5 Forest Court, Columbia, S. C. Larchmont, N. Y. Mr. C. E. Little, Pres., American Delphinium Society, Dr. C. Eugene Pfister, Pres., Richmond Hills, American Rose Society, Ontario, Can. Mundelein, Ill. Dr. Frederick L. Fagley, Prell., Mr. Wm. T. Marshall, Pres. Emeritus, American Fern Society, Cactus & Succulent Society of America, 287 Fourth Ave., 228 Security Bldg., New York 10, N. Y. Phoenix, Ariz. Mr. Marvin C. Karrels, Pres., Mr. C. R. Wolf, Pres., American Peony Society, Holly Society of America, 3272 South 46th St., Lock Box 71, Milwaukee 14, Wise. Millville, N. J. SOCIETIES AFFILIATED WITH THE AMERICAN HORTICULTURAL SOCIETY 1953 American Association of Nurserymen, American Iris Society, Dr. Richard P. White, Exec. Secy., Mr. Geddes Douglas, Secy., 636 Southern Building, Franklin Road, Washington 5, D. C. Brentwood, Tenn. American Primrose Society, American Begonia Society, Mrs. Otto Zach, Pres., Mrs. Edna Korts, Pres., 1172 S. E. 55th Ave., 3628 Revere Ave., Portland 15, Oreg. Los Angeles 39, Calif. American Rose Society, American Camellia Society, Dr. R. C. Allen, Secy., Box 2398 University Station, 1316 Derry St., Gainesville, Fla. Harrisburg, Pa. American Fuchsia Society, Bel-Air Garden Oub, Inc., Mr. Mel Newfield, Pres., Mrs. Frank P. Winne, Treas., 3809 T St., 822 Sarbonne Rd., Sacramento 17, Ca:1if. Bel-Air, Los Angeles 24, Calif. Birmingham Horticultural Society, American Gesneria Society, 1 Winthrop Ave., Mt. Brook, P. O. Box 464, Birmingham, Ala. San Leandro, Calif. Cactus & Succulent Society of America, American Gloxinia Society, Mr. Harry Johnson, Jr., Pres., Mr. Elvin McDonald, Editor, Box 458, Gray, Okla. Paramount, Calif. Publleation Office, S2nd and Elm Ave., Baltimore, Md. Entered a8 second-ela88 matter JanulP'J' 2'1. 1932, at the Post Office at Baltimore, Md., nnder the Act of Augusi 24., 1912. Robe1't L TaylO1' [See Page 112] Acer Davidi I The Flowering Dogwood FRANCIS DE VOS2 In an area stretching from the coast fruits, fi rst against the greens and of southern Maine, westward to Iowa finally against the rich red-orange and Nebraska and southward to Flor­ leaves, are a spectacle of ranking beau­ ida and Texas the fl owering dogwood, ty even in the astute company of the e01'nUS jiorida, occurs naturally. As maples, hickories, and sweet gums. a dependable ornamental, its range of Even with leaf fall fh is dependable per­ usefulness shrinks slightly along its former has still another but subtler natural northward boundaries in Michi­ point of interest. Have you ever no­ gan, Illinois, New York, and Massa­ ticed the tracery of the bare branches chusetts, due to occasional low winter against a winter sky ? The graceful, temperatures which kill the flow er knobbed, upcurving branchlets trace a buds. pattern of promise for another stellar With equal suitability this small tree performance to begin with the arrival is satisfadory in the formal or natu­ of sun-warmed spring winds. ralistic setting; this transition from the Although the single white "flowered" gardenesque to the natural setting is a forin is undoubtedly the most widely gap too broad for most plants to bridge. planted there are several variants in Its scope of usefulness also extends cultivation, the best known being ntb"a from the diminishing large mansion to -the pink "flowered" form . Other the small one-storied project home. lesser known variants are the weeping Ornamentals with :b ut a single fea­ form pendula, the double fl owered form ture of interest-flowers, fruit, or foli­ pluribrGJcteata, and the yellow fruited age-are all too commonly used in form xanthoca1'pa. Variation in the landscape work. This criticism could leaf is found in the willow-leaved form never be leveled at the fl owering dog­ salicifolia, and the variegated leaved wood. In the spring the showy white form Welchii. or pink bracts surrounding the incon­ spicuous flow ers lighten our woodlands C££ltural Require11'Lents and gardens. During the summer Good cultural practices are prerequi­ months it retires to relative obscurity site to successful disease and insect con­ only to put 011 a double show of bril­ trol and for the development of healthy, liant color in the fall. The bright red vigorous trees. Where does good cul­ lIt was the h01Je--and in.tention~of ~he Edi.to?· ture start then? I t starts with the to p7'B.sent at th1'.<: season a com,,?7'ehen~~ve renew of various Mpects of the j1ow enn.fl donwood that care that is exercised during digging rni!}ht be of i nte?'est .to g{/1·dene ... ~ . A on~·m<ln s )fnthes~, of tMs subject ., eem.'. ,lit . the p~eser't and transplanting. N ursery grown sta,tll of hnrticnltv./rfll s'f)eriol'iz(l,tl:on. 1.:mtp'J'{bct'Lc(t,ble. dogwoods, 3-4 feet in height may be Some phases or the (Loqwood'., (lpp~al GIl'e currently m01'e c nmr)l~ ll vn(J than nti1e'rs , totr tn.~t nnce thf3 con­ transplanted bare rooted in the spring cern felt i.n the MirLdle Atlamtic StatiM nve.r the appe01'atnce of ((, new disealJe that tS de st1'.uct'llve. of or early autumn ; plants taken from the it. I, 10 om.. A,i- an U1J·to·(/.a,te ,..view of th"" "ublect wo.' bnth timely a"d, avn.ilable, it was deemuL I'~st wi ld should be moved only in the to 1)rpse.nt it 'Y1 ,nw. tnoeth e'r with .~()me mate?"W.l on "eletted topics such as the pl.nee of the dogwood spring and then only after root-prun­ im the ga.·den, veqetntive 1!"opagation, am,d sprn'II ' inn .without w{I,itim,g ""nil! tlley cmdd I,. f"lly ing 1-2 years prior to moving. It is inteJ]1·nted.- ED, true that dogwoods can be moved when 2Hortit ulhU'ist, U. S. ~"tiona l Arboretum. [55] 56 THE NATIONAL HORTICULTURAL MAGAZINE Apr. 1953 in full leaf or that wilding trees C(}JJ1, be The next step in transplanting is the moved without root-pruning first but actual planting of the tree. The hole these practices should, I believe, be should be slightly larger than the full used only when it hasn't been possible root system of the dug tree and the to use the time-honored methods which depth of planting should closely ap­ have given good results in the past. proximate irts original depth. It is The possession of a healthy, vigorous hQghly important in heavy, poorly dogwood on the home grounds is not drained soils to loosen the soil in the an accident, it is the result of good bottom of the hole to a depth of at least practices carried out during transplant­ 18 inches by spading or when possible ing and afterwards. Your dogwood with dynamite. Top soil, to which peat deserves this care-it is a true ansto­ has been added, should be used to fiJI <:rat of our gardens. in around the roots and thorough wa­ The fungus of the crown canker dis­ tering after transplanting is necessary ease of dogwoods and several species to settle the soil around the roots and of wood-borers are known to enter the to eliminate air pockets. plant through wounds received at the Although we have no precise data base of the trunk during transplanting. on how much and how often dogwoods Careful transplanting, then, demands need to be fertilized, it is a generally that skinning the bark, particularly accepted practice to .fertilize at least near the soil line be avoided. If wound­ every three years and even more often ing has resulted, painting immediately if the tree appears to need additional with shellac and then with a good tree nutrients. The use of a 10-8-6 fertil­ paint is advisable. The use of Kraft izer which leaves an acid residue is crepe paper around the trunk and larg­ recommended at .the rate 2-4 pounds er bran<:hes is generally recommended for each inch diameter ot the tree at to prevent the entrance of borers breast height; the ferlilizer can be ap­ through wounds received in planting. plied in early spring or late fall. Spot Anthracnose And Other Leaf And Petal Spot Of Flowering Dogwood ANNA E. J E N KINS, J ULIAN H. MILLER, AND GEORGE H. HEPTING1 The flowering dogwood has been ject, especially at this season when the called :by the late Alfred Rehder "one lovely white or pink blooms of the dog­ of the most beautiful of American flow­ wood again ornament the spring land­ ering trees." In similar sentim ent, Jay scape.