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(Last Modified On 10/28/2012)
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(Last Modified On 10/28/2012)
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Species
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DiOSCOREA CYMOSULA Hemsl.
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PlaceOfPublication
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Biol. Centr.-Am. Bot. 3:355. 1884.
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Synonym
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Dioscorea cymosula var. Duchassaingii Uline ex Knuth, in Notizbl. Bot. Gart. Berlin 7:203. 1917. Dioscorea perinollis Knuth, in Engl. Pflanzenr. IV. 43:61. 1924.
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Description
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Stems climbing sinistrorsely, not winged, unarmed, densely puberulous; leaves alternate; petioles up to 6 cm. long, puberulous; leaf blades suborbicular, about 10 cm. long and 9 cm. wide, sharply acuminate, deeply cordate at base, not lobed, not pellucid-lineolate, puberulous above, densely soft-pilosulous beneath, 13- to 17-nerved; staminate inflorescences 2-4 in an axil, unbranched, the rhachis densely pilosulous; flowers in small scorpioid racemes along rhachis, or some of them soli- tary, short-pedicellate, the pedicels 0.5-2 mm. long, pilosulous; perianth segments oblong, 2-2.5 mm. long, pilosulous externally; stamens 6, all fertile, borne on perianth segments, the filaments about 0.5 mm. long, slender, the anthers 0.25 mm. long, introrse, ovary densely tomentose; capsules puberulous, oblong, nearly 3 cm. long and 11 mm. wide; seeds winged all around.
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Distribution
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Known definitely, at least in typical form, only from Panama.
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Native
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Panama
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Specimen
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CANAL ZONE: Ancon Hill, Killip 3035 (TYPE of D. permollis), I2086; Gamboa, Pittier 4800. COCLE: between Las Margaritas and El Valle, Woodson, Allen & Seibert 176I. PANAMA: La Chorrera, Paul 508.
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Note
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The type came from Loseria, Panama (Hayes 726). The type of var. Du- chassaingii was collected samewhere in Panama by Duchassaing. As pointed out by me (Carn. Inst. Publ. 461:250. 193-6), Knuth erroneously referred his new species D. permollis to subg. Helmia, sect. Dematostemon, whereas it actually belongs in subg. Eudioscorea, sect. Macrogynodium.
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