(Last Modified On 9/27/2013)
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(Last Modified On 9/27/2013)
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Species
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Eriosema simplicifolium (H.B.K.) G. Don
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PlaceOfPublication
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Gen. Hist. 2: 348. 1832.
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Synonym
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Glycine simplicifolia H.B.K., Nov. Gen. Sp. P1. 6: 419. 1823. TYPE: Venezuela, "prope Atures, ad cataractas Orinoci," not seen. Rhynchosia simplicifolia (H.B.K.) DC., Prodr. 2: 389. 1825. Eriosema lanceolatum Benth., Ann. Nat. Hist. 3: 438. 1839. British Guiana. Schomburgk 651 (US, isotype).
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Description
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Herbs procumbent to decumbent; stems terete, villous to pilous. Leaves un- ifoliolate, the leaflets ovate, 6.0-7.5 cm long, 1.5-3.0 cm wide, apically obtuse, basally cuneate, the margins entire, sericeous on both the surfaces, occasionally strigose below; petioles 0.2-0.5 cm long, heavily strigose; stipules lanceolate, 0.4-1.0 cm long, 0.1-0.3 cm wide. Inflorescence few flowered with 2-4 flowers, 3.0 cm long; peduncle 1.5-1.8 cm long; pedicel 0.4-0.5 cm long; bracts lanceolate, caducous, 0.4-0.8 cm long, 0.2-0.3 cm wide. Flowers with the calyx 0.5-0.6 mm long, the tube 2.0 mm long, strigose; corolla yellow, 0.9-1.0 cm long, the standard obovate, 1.1-1.3 cm long, 0.5-0.6 cm wide, auriculate at the base, the wings oblong, 1.1-1.2 cm long, 0.4-0.5 cm wide, the keel falcate, 1.2-1.3 cm long, 0.4- 0.5 cm wide; stamens 1.0-1.2 cm long. Fruit ovate, 1.5 cm long, 0.7 cm wide, brown strigose; seeds ovate, 4.0 mm long, black.
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Distribution
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ranges from Central America and the Greater Antilles to northern South America.
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Note
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Grear (1970) has segregated E. simplicifolium into two varieties: var. micranthum is restricted to Bolivia, Paraguay, and south- eastern Brazil and is differentiated by its smaller flowers and occasionally erect habit. However, E. simplicifolium appears to have continuous variation through- out its range in Panama and surrounding regions. In Panama E. simplicifolium occurs on llanos, usually in sandy soils.
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Specimen
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CHIRIQUT: LIanos W of Gualaca, 500 ft, Allen 5050 (GH, MO). San Fe1ix, 0-120 m, Pittier 5257 (NY, US).
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