THE AMERICAN HORTICULTURAL SOCIETY, INC. * January 1962
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~GAZINE THE AMERICAN HORTICULTURAL SOCIETY, INC. * January 1962 AMERICAN HORTICULTURAL SOCIETY A union of the A mel-ican Horticultural Society and the American Horticultural CouncIL 1600 BLADENSBURG ROAD, NORTHEAST. WASHINGTON 2, D. C. For United Horticulture *** to accumulate, increase, and disseminate horticultural intorma!ion Terms Expiring 1962 B. Y. MORRISON, Editor FREDERIC P. LEE JAMES R. HARLOW, Managing Editor Maryland HENRY T. SKINNER District of Columbia Editorial Committee GEORGE H. SPALDING California JOHN L. CREECH, Chair'man RICHARD P. WHITE 'N_ H. HODGE District of Columbia ANNE WERTSNER WOOD FREDERIC P. LEE Pennsylvania CONRAD B. LINK Terms Expiring 1963 CURTIS MAY l'vIARY W , M. HAKES FREDERICK G. MEYER Maryland WILBUR H. YOUNGMAN GRETCHEN HARSHBARGER Iowa FREDERIC HEUTTE OfficeTS Virginia PRESIDENT W. H. HODGE Pennsyillania DONALD WYMAN ALBERT J. IRVING Jamaica Plain, Massachusetts New York FIRST VICE-PRESIDENT Terms Expiring 1964 HENRY T. SKINNER Washington, D. C. R. C. ALLEN Ohio SECOND VICE-PRESIDENT P. H. BRYDON California ANNE WERTSNER WOOD CARL 'W. FENNINGER Swarthmore, Pennsylvania Pennsylvania JOHN E. GRAF ACTING SEORETARY-TREASURER Dish-ict of Columbia GRACE P. WILSON GRAOE P. 'WILSON Blaciensbw-g, Maryland J1i[arylanci The American Horticultural Magaline is the official publication of the American Horticultural Society and is issued four times a year during the quarters commencing with January, April, July and October. It is devoted to the dissemination of knowledge in the science and art of growing ornamental plants, fruits, vegetables, and related subjects. Original papers increasing the historical, varietal, and cultural knowledges of plant materials of economic and aesthetic importance are welcomed and will be published as early as possible. The Chairman of the Editorial Committee should be consulted for manuscript specifications. Reprints will be furnished in accordance with the following schedule of prices, plus post age, and should be ordered at the time the galley proof is returned by the author: One hundred copies-2 pp $6.60; 4 pp $12.10; 8 pp $25.30; 12 pp $36.30; Covers $12.10. Entered as second class matter in the post office at Baltimore, Maryland, in accordance with the Act of August 24, 1912. Additional entry for Washington, D.C., was authorized July 15, 1955, in accordance witb the pro visions of Section 132.122, Postal Manual. A subscription to The American Ho,ticultural Magazine is included as a benefit of membership in the American Horticultural Society, Individual Membership dues being 16.00 a year. JANUARY. 1962 TIIE ~En.ICAN FORMERLY THE NATIONAL HORTICULTURAL MAGAZINE VOLUME 41 • NUMBER 1 Contents The Best of the Dogwoods DONALD WYMAN _________________ ____________________ ____ _______ ____ ____ __ __ ____ ______ ______ ________________ I Lapageria in Oregon DONALD '!\T. STRYKER ________________________ ___________ _______ ___ ___ _____________ ___ _______ ___ ____ ____ ___ II A Rarely Cultivated Pitcher Plant W. H. HODGE ________ _____ ___ _________ ____________________ _____ ____ ______ _____ ____ _______ ____________________ ___ 13 Some Shade and Ornamental Maples, Part 2 CURTIS lVIA Y _________ ________ _______ ____ ____ ___ ____ _______ _____________ ____________________ _________________ ____ 17 The Wild Yellow Roses and Related Species GRAHAM S. THOMAS __ ___ ___ ________ ___ _______________________ ____________________ ___ _________ ____ ______ 28 A Book or Two ________ ____ ___ __ ____ ______________________________________________________________ _____________ ___ 36 The Gardeners' Pocketbook CUTcnma Toscoeana. B. Y. MORRISON _______________________________________________ ___ ____ 42 Growing Plants in "Feather Rock." FREDERICK W. COE ______ ___ ______ ____ ___ ___ _ 43 A Titan Arum Flowers. W . H. HODGE ___ ______ __ _______ ____ _____________ __________________ 45 Gm-donia lasianthus Again. :MORLEY WILLIAMS __ _________ ____________ _________ 48 Mahonia lomaTiaefolia and others. B. Y. MORRISON _________________ ____ __________ 49 Hoya daTwini-Dischidi mfflesiana. HENRY TEUSCHER ___________ ____ ________ __ 50 Vallota speciosa. W. H. HODGE _______ ____ ______ ___ __ __________ ____ ______ ____________________ __ 52 These Plants Have Scents. FREDERICK W. COE _________ _____________________ _________ 53 Chinese Quince. CAROLINE DORMON ________ ______ ____________ _____________________________ ___ 54 Two Native Azaleas. B. Y. MORRISON _______ _______ ____________ ______________________ _______ _ 55 Winter Heiiotrope. ELIZABETH LAWRENCE ___ ___ _________ _______________ _______________ 56 Junipenls confe)-ta. JOHN L. CREECH ________ _____ ____________ _________ _____ _____________ __ 56 Odd Tree Noises. FREDERICK W. COE ____ __________ ______________________ ___ _______ _____ ___ _ 58 Skunk Cabbages. W. H . HODGE __________ __ ____ __ __________ ____ _______ _________________________ 58 Magnolia sott.langiana var. bTOzzoni. B. Y. MORRISON _____________________ ______ 60 JAN UA RY covr;;R ILLUSTRATION (HENRY TEUSCHER) Hoya darwinii (See page 50) Copyrigill, © 1962 by The AmCl"ical1 Horticullural Society. Inc. ARNOLD ARBORETU?\-f Figure 12 Paperbark lt1.aple, Acer griseum Peeling of the reddish-brown bark is characteristic (See page 17) The Best of the Dogwoods DONALD WYMAN Speak of dogwoods, and most garden come badly mixed in the American nurs ers immediately think of two or three eries. We haye been disappointed many species which are popular small tree , times in ordering plants from Ame-ican but there are many more species and sources under Lhi s name, only to find vari eties in this interesting and ornamen when the plan ts arrive that they were tal clan. In fact, American nurserymen not true Siberian Dogwood, but rather today are offering approximately forty C. alba, the European C. sanguinea, or five species and varieties, while over one of the native Americans with red or sixty-he are growing in the Arnold Ar reddish twigs (C. stolonifera, C. amo boretum at Jamaica Plain, Massachu m um, or C. baile'yi). setts. Not all are outstanding ornamen The Arnold Arboretum obtained tals, bu t those that are, or wi th further plants purporting to be tha t of Siberian trial may prove themselves to be, certain Dogwood from nearly thirty-six sources ly are worth careful consideration by the in this country and abroad, noted the in teres ted gardener. considerable mix-up, found the true va Vi sitors who may have made a May riety and re-introduced it to American pilgrimage to Valley Forge, Pennsylva sources. The true Siberian Dogwood is nia, when the Flowering Dogwood (COT hard to distinguish from the species on nus {101-ida) is at its height of bloom, purely botanical characteristics but is feel that this one species is the most im recognized by the f;'lct that the twig color portant. There special efforts have gone is a more brilliant red, making it more into making an extensive planting of worth-while as an ornamental for winter these beautiful trees as a living memo display. rial to the Revolutionary soldiers who Even native American species are fre wintered there almost two centuries ago. quently mis-identified. Such is the cast' On the other hand, people who live sometimes with C. stolonifem and C. in the Pacific Northwest are familiar amomurn. Both have reddish twigs, but with the beautiful Pacific Dogwood (C. C. stolonifera is usually the more desir nutted Iii) which does do so well along able of the two for ornamental planting the 'Vest Coast but does not grow well because of its stoloniferous habit of in the East. growth, lower size and greater hardiness. People who have made a hobby of ar One nurseryman was propagating thou ranging flowers have come to realize that sands of C. amomU1n (with brown pith) the Cornelian cherry (C. mas) is one of and labelling it C. stolonifera (which has the best of this entire group for "arrange white pith) before he realized his rather ments," especially for those made early serious error. in the season when branches cut from It is also probable that these shrubby garden plants are forced indoors for pre types can hybridize, one with the other, cocious bloom. so it becomes increasingly important to Then there are those shrubs with col realize the differences between the spe ored twigs, some of which are outstand cies and offer them for what they really ing all winter long. The native Red Osier are. Dogwood (C. stoloni/era) is colorful, but In order to do this so that comparisons the true Siberian Dogwood (C. alba sibi can be made, it seems advisable to divide rica) is even more brilliantly colored. It the plants into tree types, large shrub is unfortunate that this variety h~s be- types-from seven to twenty feet-and low shrub types. Since nearly forty spe H orticulturist of the Arnold Arboretum, H arvard cies and varieties have some merit for U niversiry, Jamaica Plain, 'Massachusetts, and Presi de nt o f the Amcri c.a n H orticulLural Society. landscape planting and another fifty are [l ] 2 THE AMERICAN HORTICULTURAL MAGAZINE ARNOLD ARBORETUM Cornus controversa either inferior to the selected group or from Long Island southward, with large no better ornamentally, only those that leaves four to seven inches long and as are worthy of consideration for landscape much as three and a half inches wide. planting will be discussed here. The flowers are small, in yellowish-white clusters about four to six inches wide but Tree Types without conspicuous bracts. Even though There are six species of dogwoods that it is not superior to C. controversa in are trees in this group recommended for flower, it may have merit in some situ landscape use, four of them being na ations because the flowers appear in July tives of China or Japan (C. capitata, C. and August, at a time when few other macmphylla" C. conlmveTsa, _ and C. trees bloom. Certainly it has merit as a l?o1£sa), and two natives of North Amer foliage tree. ica (C. nuttallii and C. {lOl"icla). The One of the taller of the dogwood trees least hardy, seldom planted in the United growing up to sixty feet high, is the Giant States (except in protected gardens on Dogwood (C.