October 1956
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~GAZINE Please address all commw~ica tions to THE AMERICAN HORTICULTURAL SOCIETY, INC. 1600 Bladensburg Road, Northeast Washington 2, D. C. OFFICERS P1'esident: Dr. Donovan S. Correll, Renner, T exas First Vice-President: Dr. Frederick W. Coe, Bethesda, Maryland Second Vice-Presiden·t : Mrs. Walter Douglas, Chauncey, New York Secretary: Dr. Francis de Vos, Washington, D. C. T1'e as~£rer: Miss Olive E. Weatherell, Olean, New York Editor: Mr. B. Y. Morrison, Pass Christian, Mississippi ManagitJ,g Editor: Mr. James R. Harlow, Quinque, Virginia Edit01'ia l Staff: Miss May M. Blaine, Washington, D. C. Mr. Bernard T. Bridgers, Washington, D. C. Ad Editor: Mr. Cha·rles C. Dickson, Kensington, Maryland DIRECTORS T erms Expi1'ing 1957 T e1'11"ls Exp'iring 1958 Dr. Ca rl O. Erlanson, Silver Spring, Mary- Mr. Stuart Armstrong, Silver Spring, Mary- land land Mr. Frederic P. Lee, Bethesda, Maryland Dr. John L. Creech, Glenn Dale, Maryland Mr. Brian O. Mulligan, Seattle, Washington Mrs. Peggie Schulz, Minneapolis, Minnesota Dr. J . F. Styer, Concordville, Pennsylvania Dr. R. P . White, Washington, D. C. Dr. Freeman A. W eiss, Washington, D. C. Mrs. Harry Wood, Swarthmore, Pennsyl vania DIRECTORS EMERITUS Mrs. Robert Woods Bliss, Washington, D. C. Mrs. J . Norman Henry, Gladwyne, P ennsy lvania Mrs. Mortimer J. Fox, Mt. Kisco, New York Mrs. Arthur Hoyt Scott, Wallingford, Pennsylvania HONORARY VICE-PRESIDENTS Dr. A. S. Crafts Mrs. Martha F. Maxwell American Society of Plant Physiologists Epiphylh!m Society of Ame1'ica University of California 500 Grove Place Department of Botany Glendale 6, California Davis, California Dr. Dwight M. Moore Mr. Harry W. Dengler American Fern Society Holly Society of Amer~ca University of Arkansas MarylaHd Extension Service Department of Botany and Bacteriology College Park, Maryland Fayetteville, Arkansas Dr. Freeman S. Howlett Mr. W. D. Morton, Jr. America1, Society for Horticultural Science At11erica1t Amaryllis Society The Ohio State University 3114 State Street Drive Department of Horticulture and Forestry New Orleans 25, Louisiana Wooster, Ohio Miss Gertrude M. Smith Mrs. Roy Arthur Hunt John 1. Tyler Arboretum Garden Club of America Lima, Middletown Township 4875 Ellsworth Avenue Delaware County, Pennsylvania Pittsburgh 13, Pennsylvania Dr. Donald P . Watson Mr. Woodson K. Jones American H ort~cul tlwal Council Men's Garden Clubs of America Michigan State University 1827 Devine Street Department of Horticulture Jackson 2, Mississippi East Lansing, Michigan The National Horticultural Magazine VOL. 35 Copyright) 1956, by THE AivIERIC AN HORTICULTURAL SOCIETY, INC. No. 4 OCTOBER 1956 CONTENTS Bauhinia-The So-Called Orchid Tr(les. R. BRUCE LEDI N and EDWIN A. MENNINGER ____ ___ __________________________________ . _____ ._____________________ 183 Four Native American Mints. H ELEN M. Fox ____ ________________________________________ 201 Your Hibiscus and How To Grow Them. CLARENCE A . BASS ________________ 207 Jean and Vespasien Robin, "Royal Botanists," and North American Plants, 1601-1635. MAR]ORrE F. WAR NER ____ __ _____________________________________ 214 Florists' Gloxinias-1817-1956_ PEGGIE SCHULZ ______ __ ____________ __ _________ ___ ________ 221 Scented-Leaved Geraniums. MARY ELLEN Ross _____ ___ _______________________ _____ ____ 225 A Book Or Two ____________ ____ ________ ____ __ ____________ __________ ____________ ______ ____ ___ __________________ _ 235 Index To VolLu11e 3 5 ____ _______ ___________________________________________________________________ ____________ 239 The National Horticultural Magazine The National Horticultural Magazine is a quarterly journal, being the official publicatiou of The American Horticultural Society, Incorporated. It is devoted to the dissemination of knowledge in the science and art of growing ornamental plants, fruits, vegetables, and related subj ects. The Journal is printed by Monumental Printing Company at Thirty-second Street and Elm Avenue in Baltimore, Maryland, and is entered as second class matter in-the post office of that city in accordance with the Act of August 24, 1912. Additional entry for Washington, D. c., was authorized July 15, 1955, in accordance with the provisions of Section 132.122, Postal Manual. Subscription to the Journal is included in membership, which is $5.00 a calendar year. Original papers increasing the historical, varietal, and cultural knowledges of plant mate rials of economic and aesthetic importance are most welcomed and will be published as pf0mptly as possible. Material of lasting interest appearing in related journals will be re printed as available. Publications received for the Library will be reviewed and made avail able to members after publication of the reviews. These books are designated "Library" following the prices in the book reviews. Reviews of private collections will also be accepted and published. Th'ese books, however, are not available for loan to members of the Society. Manuscripts should be prepared to conform to the style adopted in the latest number of the current volume. The nomenclature us('d in manuscripts, whether treating horticultural or botanical subjects, should be in conformance insofar as possible with the Codes published by the International Association for Plant Taxol'lomy. They should be typewritten with douhle spacing, leaving a one-inch margin at the left for editorial direction to the printer. Footnotes to text statements should be avoided unless they are absolutely necessary. Usually the infor mation can be included in the text, parenthetically if necessary, without making the reading too cumbersome. Footnotes to tables are often necessary and should be designated by small Roman letters. Literature citations, footnotes and illustration legends should be on a separate sheet. Authors are requested to give for each citation, the author, or authors, year of publica tion, full title or citation withoat abbreviation of the journal or volume, in the case of jour nals, the beginning and ending pages; of books the edition number and the number of pages, the name and address of the publisher. One set of the galley proofs will be sent to the author for corrections, which should be held to a minimum. and such corrections should be returned immediately. Reprints, saddle-stapled, will be furnished in accordance with the following schedule of prices, plus postage, and should be ordered at the time galley proof is returned by the author: Copies 2pp 4pp 8 pp 12 pp 16 pp Covers 100 $ 5.50 $10.00 $20.00 $29.00 $38.00 $10.00 200 7.00 11.50 23.00 .33.50 43.50 11.50 300 8.50 13.00 26.00 38.00 49.00 13.00 400 10.00 14.50 29.00 42.50 54.50 14.50 The Journal is issued for the guarters commencing with January, April, July, and October. Manuscripts mast reach the Editorial Office at the Society's Headquarters three months before publication is desired. Missing numbers will be replaced without charge provided claim is received in the Editorial Office within thirty days after publication date. B(}juhinia acu1niNata BAUHINIA The So .. Ca lled Orchid Trees R. BRUCE LEDIN1 & EDWIN A. MENNINGER2 Most popular of flowering tropical tain animals, and this resemblance has trees from southern California to Florida3 given to the plants, in many countries, the and in restricted warm areas of the Gulf common names of cow-hoof, bull-hoof, Coast are the so-called "orchid trees," horse-hoof, goat-hoof, sheep-hoof, camel which are not orchids at all, but belong foot, deer-hoof, mule-hoof, etc. to the bean family. Many of them do have pretty flowers, remotely orchid-like Actually, the leaf shapes of BM~hinia in appearance, which are responsible for vary considerably and are of three dis the common name. The correct name of tinct types: (a) Simple leaf which is the genus is Bauhinia, honoring botan notched, cleft, incised, or divided to some ists John and Caspar Bauhin who were degree, thus making a bi-Iobed leaf. This not twins, as sometimes reported; John division may merely be a slight indenta was born in 1541 and died in 1631, Cas tion at the apex (as in B. retusa) or it par was born in 1560 (19 years younger) may be to the middle of the leaf or nearly and died in 1624. The dual brother idea to the base (B. 1'ufesce1'ls). The common is carried out by the plants, for practically species in cultivation are of this type all of the 500 kinds4 of Ba~d",i11lia have but it is the "twin lobes" of the leaf not two-lobed or twin leaves, shaped to sug "twin leaves." (b) A few species (appar gest the imprint of the cloven hoof of cer- ently none in cultivation) have entire 1 Assistant Horticulturist, University of Flor enheit. B. saigonensis has been grown success ida, Sub-Tropical Experiment Station, Home fully under slat shade in Gainesville. stead, Florida. 4 Weare aware that most books say there 2 The Flowering Tree Man, Stuart, Florida. are about 250 species of Ba7-£hil£ia. But after 3 B. variegata has been grown successfully as checking through Kew Index and all the avail far north as Ocala. Also plants have been tried in Gainesville and Daytona Beach but a cold able floras of tropical countries, we have come winter will usually kill them back to the ground. to the conclusion that the number of species is In Gainesville, one small tree flowered in Janu probably close to 500. Of these, probably about ary but it was killed later that year. The tree fifty are in cultivation throughout the world, prefers warm areas, but it has succeeded as far but only about ten species are well known. north as New Orleans where it has survived There are more than a hundred species native temperatures down to twenty-six degrees Fahr- to Brazil. [1 83 1 184 THE NATIONAL HORTICULTURAL MAGAZINE October 1956 leaves with an obtuse or pointed apex a;lJ The Big Three resemble the common red-bud leaves.