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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 RACEMOSA (Klotzsch) Uline
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PlaceOfPublication
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Engler Bot. Jahrb. 22:430. 1897.
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Synonym
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Helmia racemosa Klotzsch in Otto & Dietr. Allg. Gartenzeit. 19:393. 1851.
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Description
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Stems climbing dextrorsely, unarmed, glabrous; leaves alternate; petiole about 6 cm. long, glabrous; leaf blades broadly ovate, up to 11.2 cm. long and 9.8 cm. wide, acuminate, lightly cordate at base, membranous, entire, glabrous, 9- to 11- nerved; staminate inflorescences 2 or 3 in an axil, up to 17 cm. long, unbranched; flowers solitary or paired or rarely in threes, pedicellate, the pedicels 1-1.5 mm. long; perianth segments purple, ovate-oblong, 1.75 mm. long, spreading, glabrous; stamens 3; staminodia none; filaments very short, distinct, inserted on a fleshy, central disk, the anthers small, upwardly dehiscent; rudimentary style none; pistillate flowers and capsules unknown.
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Distribution
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Costa Rica and Panama.
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Specimen
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BOCAS DEL TORO: Fish Creek, von Wedel 2275. COCLE: vicinity of El Valle, Allen 1258. PANAMA: Campana, Allen 1869.
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Note
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Dioscorea borealis Morton, of Costa Rica, was originally described (Jour. Wash. Acad. Sci. 27:304. 1937) as belonging to the section Centrostemon. This was due to erroneous observation of the androecium. It really belongs in section Cycladenium, and is very close to D. racemosa var. Hoffmannii Uline from description. This variety may be specifically distinct from typical D. racemosa, the type of which was collected by Warscewicz in "Central America."
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