(Last Modified On 9/30/2013)
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(Last Modified On 9/30/2013)
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Species
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Macroptilium atropurpureum (DC.) Urban
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PlaceOfPublication
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Symb. Ant. 9: 457. 1928.
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Synonym
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Phaseolus atropurpureus DC., Prodr. 2: 395. 1825. 'atropurpureus.' Based on an unpublished plate in Sesse & Mocinio, Icones Florae Mexicana (G).
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Description
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Twining and clambering vine; stems long pilose. Leaves pinnate trifoliolate; leaflets ovate, elliptical or linear, often 2-3 lobed, the lobes and sinuses mostly rounded; apically acute or obtuse, mucronate, basally obtuse or truncate, the costa and the major lateral veins prominent beneath, obscure above; softly to- mentose on both sides, more so beneath, mostly 2-4 cm long, 8-25 mm wide; lateral petiolules ca. 1.5 mm long, terminal petiolule ca. 2 mm long, petiole and rachis spreading short pilose; stipels subulate, 1 mm long, pubescent; stipules narrowly acute, striate, ca. 3 mm long. Inflorescences to 30 cm long, the flowers distributed along the apex of the peduncle; peduncle retrorsely short pilose; bracts and bracteoles narrowly ovate, acute, 1-1.5 mm long, cucullate, nervate, ciliolate; pedicels 1-2 mm long, puberulent. Flowers deep red to black purple; calyx tu- bular campanulate, densely pilose or merely puberulent, the tube 4 mm long, the teeth lanceolate, ca. 2 mm long, subequal; standard 1.5-2 mm long. Legume linear, 7-10 cm long, 2-4 mm wide, appressed pilose; seeds oblong ovoid, dark, shiny, ca. 3 mm long, the aril white.
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Habit
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vine
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Note
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Macroptilium atropurpureum is distinct in its pubescent, usually lobed leaves. This species ranges widely in the neotropics. In Panama it occurs in Pacific watershed areas with substantial dry season.
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Specimen
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CANAL ZONE: Anc6n, Greenman & Greenman 5066 (DUKE). La Boca, Mori & Kallunki 3675 (MO). Between Corozal and Anc6n, Pittier 2173 (NY). 1 mi N of Summit, Tyson et al. 2744A (SCZ). Contractors Hill, Tyson & Dwyer 6494 (MO). COCLt: Rio Hato Airstrip, Burch et al. 1129 (MO.) LOS SANTOS: Chitr6-Las Tablas, 0-100 m, Burt & Rattray 52, 98 (both MO). Monagre Beach, 5 mi SE of Chitr6, Tyson et al. 3011 (SCZ). PANAMA: 2 km W of entrance to Lago Mar on Panamerican Highway, Folsom & Lantz 1901 (MO). Sardinilla, Taylor 37 (MO).
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