Hydrosme

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Standard Cyclopedia of Horticulture

Hydrosme (name probably refers to the wet or aquatic habitat). Araceae. By some held to be the proper genus for Amorphophallus rivieri (H. rivieri, Engl.); out in the latest monograph (Engler, Pflanzenreich, hft. 48, 1911) it is included in Amorphophallus, as is also Corynophallus, constituting a section of the genus. When kept distinct from Amorphophallus, the separation is largely on technical characters of the seeds.

The section Corynophallus of the genus Amorphophallus, as accepted by Engler, comprises only Amorphophallus leonensis, Lem. (Corynophallus afzelii, Hort. C. leonensis, Engl. Hydrosme leonensis, Engl.), which is sometimes cult, in two or three forms (Vol. I, p. 276): peduncle very stout, 3-8 in. high, from an oblate tuber, bearing a pyriform erect spathe 6 in. high; tube of spathe 1 ¾ in. diam, white: limb concave, 3 ½ in. broad at about the middle, rounded at top; mouth of spathe dark purple streaked with dirty white and bearing a few roundish spots; lips of spathe black-purple, incurved: spadix expanding toward the top so that it nearly fills the spathe, brown and mottled: lf. 1, appearing after the fls.; on an erect petiole 2-3 ft. high, the blade about 12 in. across and trisect; primary segms. 1- or 2-pinnatifid, the ultimate segms. narrow-linear. Sierra Leone, and adjacent regions. B.M. 7768. F.S. 2:161. G.C. 1872:1619. Var. specldbilis, N.E. Br. (Corynophallus afzelii var. spectabilis, Mast.), petiole bearing obscure linear-oblong spots. Var. elegant, N. E. Br. (C. afzelii Var. elegans, Mast.), petiole green, segms. 2-pinnatisect, the ultimate segms. very narrow. Var. latifolia, N. E. Br. (C. afzelii Var. latifolia, Mast.), petiole green, segms. pinnatisect, the ultimate segms. broader and confluent.—This variable species may be found only rarely in choice collections.

L. H. B.


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