Volume 57 Illustrated with more than 150 photographs and drawings- Dwarfed Fr'uit Trees 9y HAROLD BRADFORD TUKEY. In this authoritative guide the author identifies the important dwarfing rootstocks and describes their propagation and growth in the nursery, He discusses the selection and spacing of trees, bracing and trellising, and fruit trees grown under glass, as bonsai and as ornamentals. He also covers tree structure and physiology, modern scientific theories of dwarfing, soils, fertilizers , pollination, costs, yields, and the locations where dwarfed fruit trees are most likely to succeed. Originally published in 1964 and now reissued , this book is unique in its field. 150 black-and-white photographs, 7V2 x 10. Society member's price: $26.55 (Regularly $29.50). "Highly recommended for those interested in maintaining ornamental trees and shrubs." -UbraryJourna/ Insects That Feed on TliAT FEED ON INSECTS AND SHRUBS ~traled An l/Ius Trees and Shrubs By WARREN T. JOHNSON and HOWARD H, LYON. "A beautiful book. It is of high quality stylistically-of folio size, with good paper, of excellent design, and with every other page being a ~;A:";~~: full-color plate .. .. There is no question about the authority and competence of Johnson and Lyon _:.::~:._ _ or of the scientific validity of the book." -Choice. 212 color plates, 9 x 12. Society member}'s price: $31 .50 through June 30, 1978; $34.65 thereafter (Regularly $35.00; $38.50 after June 30 . Of related interest- - ----_._-------- --- __ ----J AGrowth Chamber Manual Environmental Control for Plants Edited by ROBEIH W. LANGHANS. Focusing primarily how to provide precise control, and how to keep a chamber on sophisticated growth chambers used for experimental running at optimum conditions. 44 black-and-white photo­ purposes, thirteen experts cover all aspects of the mainte­ graphs and drawings, 6 Vs x 9. Society member's price: nance and operation of growth chambers - how they work, $15.75 (Regularly $17.50). orebid Biology: Reviews and Perspectives, J Edited by JOSEPH ARDITTI. Enhanced by a generous the largest of plant families. 10 figures, 20 black-and-white selection of photogr.aphs, both in color and in black and photographs, 4 color plates, 7V4 x lO V4. Society member'S white, and by impressive botanical drawings, this informa­ price: $26.55 (Regularly $29.50). tive book provides an up-to-date look at various aspects of All titles are Comstock Books published by CornelllJniversity Press. Use this coupon to order today! Ir----------------------------------------~ I THE AMERICAN HORTICULTURAL SOCIETY ----.A GROWTH CHAMBER MANUAL @ $15.75 per copy. I Publicati ons Department , Mount Vern on, Virginia 221 21 __OR CHID BIOLOGY @ $26.55 per copy. I I Pl ease send me at once the books I have indicated below. Prices shown I refl ect a 10% discount on the publishers list price. (Pl ease add 50Q per co py I for postage and handling.) I enclose $ __. 0 Check 0 Money Order Name _______________________________________ I I __D WARFED FRUIT TREES @ $26.55 per copy. I __IN SECTS THAT FEED ON TREES AND S,",RUBS @ $31.50 per Address _____________________________________ I co py (through June 30, 1978) I __IN SECTS TH AT FEED ON TR " ES AND SHRUBS @ $34.65 per I co py (after June 30, 1978) City ________,S tate ____________J..Zip ___ _ _ I I I ~----------------------------------------~ American HG)rticulturist Volume 57 Number 3 June 1978 Editor: Murray Keene Editorial Assistant: Jane Steffey Horticultural Consultant: Donald Wyman Art Directors: Mary Jourdan and Rebecca McClimans , Grafik Book Department: Tom Stevenson Production Coordination: John Simmons Publisher: The American Horticul­ tural Society, Mount Vernon, Vir­ ginia 22121. 703 /768 -5700 For United Horticulture . the particular objects and business of the American Horticultural Society are to promote and encourage na­ tional interest in scientific research Cover Photo: Ka tydid on and education in horticulture in all of its branches. Clematis by Elizabeth AMERICAN HORTICULT URIST is Friedman © 1978 the official publication of Th e American H o rticultural Society, 7931 East Boulevard Dri ve, Alexan­ Education dria, Virginia 22308, and is issued in February, April, June, August, 8 Fertilizers for Cultivated Plants-R. Milton Carleton October and December. Mem ber­ 4 Cephalotus Follicularis: The Australian Pitcher Plant-Richard M. Adams, II ship in the Society automatically in­ cludes a subscription to America n 12 Mulches for Gardens and Landscapes-Francis R. Gouin Horticulturist and $1.50 is desig­ 18 Getting A Rock Garden Together-Lynne Meyer nated for each issue of this publica­ tion. Membership dues start at 42 Growing Melons in the Mountains-R. D. Morse; C. R. O'Dell; $15.00 a year. Editorial Matters: Refer to Murray D. A. Bender Keene, American Horticulturist, Mount Vernon, Virginia 22121 Change of Pace Advertising Matters: Refer to Pub­ lisher Services, Inc., 621 Duke 11 Textures of our Earth-Nancy Hemenway Street, Alexandria, Virginia 22314 26 Hearts O'Flowers-Francis C. Cox AMERICAN HORTICULTURIST is devoted -t o the dissemination of knowledge in the science and art of Travelog growing ornamental plants, fruits, vegetable s , and related s ubjects. 34 The Cary Aboretum-Willard W. Payne Original papers which increase 38 Flowers of the Midnight Sun-Kenneth J. Smith knowledge of plant materials of economic and aesthetic importance are invited. For manuscript specifi­ Gardener's Notebook cations please address the edi tor, 6 Summer Natives Give an Architectural Value to our Woodlands­ Mount Vernon, Virginia 22121. Replacement Issues of AMERICAN Mrs. Ralph Cannon HORTICULTURIST are available at 22 Willows for Pleasure and Benefit-Floyd F. Smith; Dorothy K. Smith; a cost of $2.50 per copy, but not be­ yond twelve months prior to date of George W. Argus current issue. The opinions expressed in the arti­ 30 Ground Covers as Shady Aristocrats-Gary L. Koller cles which appear in AMERICAN HORTTCULTURIST are those of the My Favorite Plant authors a nd ~re not necessarily those of the Society. They are pre­ 3 Mountain Laurel-An American Original-Marcia Bonta sented as contributions to contem­ 14 Mangos-The Apples of the Tropics-Simon E. Malo porary thought. Second c lass postage paid a t Alexandria, Virginia and a t ad­ ditional mailing offices. Copyright © 1978 by The American Horticul­ 1 tural Society. Color separations by CHROMA-GRAPHICS IN C. Editorial "Thank You" The officers and directors of the to amateur gardening-reaching an es­ American Horticultural Society wish to timated audience of well over a million. thank the following members of the Currently the Society is implementing corporate community for their financial a major undertaking of far-reaching support of the programs and activities educational value-the construction of of the Society: a National Center for American Hor­ ticulture. The Center is being built on Alcoa Foundation the Society's 25-acre headquarters at American Garden Products, Inc. River Farm. It will offer a unique and American Telephone & Telegraph Co. significant number of activities designed David Burpee to serve professional and technical in­ Corning Glass Works Foundation terests in horticulture as well as the con­ Goodyear Tire and Rubber Company cerns of the amateur gardener. H . J. Heinz Company What will the National Center be and IBM Corporation do? Proctor & Gamble Company • It will offer indoor and outdoor live Time Life plant displays tracing the develop­ Whirlpool Corporation ment of horticultural programs in America' s corpora tions have long the country from the colonial era to been leaders in supporting our pressing the present. needs in the field of health, education, • It will demonstrate the impact of social welfare, and the arts. More re­ new plant introductions, the effect cently this aid has been expanded to in­ of hybridization and technical re­ clude support of our national heritage in search on horticulture and garden­ the field of historic preservation and the ing over the past twenty decades. conservation and protection of our nat­ • It will present displays emphasizing ural environment. not only ornamental horticulture There is yet another area where the but plants for food and environ­ corporate community is currently turn­ mental enhancement. ing its attention and s upport: the • It will offer audiovisual presenta­ American landscape and its related dis­ tions designed to acquaint the gar­ ciplines of gardening and plant science. dening public with all aspects of These concerns comprise a surprisingly planting, cultivation and plant important component of national inter­ maintenance. est and endeavor. Of most Significance, the National Directing the force of this movement Center will permit the coordination of is the American Horticultural Society. staff, office facilities and expense­ Founded in 1922, the Society is in the sharing among other scientific organiza­ tradition of serving the needs and inter­ tions locating their operations at River ests of more than 35,000 individuals, Farm. professionals, ecologists, environmen­ Will the corporate community con­ talists, scientific organizations, educa­ tinue to help? We have every confidence tional institutions and commercial en­ that it will. Companies joining the Soci­ terprises. It is dedicated to the science of ety as Corporate Sponsors at $1 ,000 or horticulture, plant development, culti­ more annually will be making a signifi­ vation and landscaping. Its impact, cant investment in our ability to extend however, reaches an impressive seg­ and deepen the Society's services to a ment of a considerably wider audi­ greater number of individuals, organi­ ence . .. the average American gar­ zations and educational institutions. dener. We, in turn, offer the participating cor­ The Society's broad range of activities porations certain benefits in return for have had a marked effect on the face of their meaningful support. this nation to the extent that it has taken For more information concerning the the leadership in disseminating knowl­ Society's appeal to the corporate com­ edge to a wide segment of the popula­ munity for support and preserving tion with topics related to gardening America's landscape, please write Mr.