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Project Name Data (Last Modified On 9/30/2013)
 

Flora Data (Last Modified On 9/30/2013)
Species Macroptilium atropurpureum (DC.) Urban
PlaceOfPublication Symb. Ant. 9: 457. 1928.
Synonym Phaseolus atropurpureus DC., Prodr. 2: 395. 1825. 'atropurpureus.' Based on an unpublished plate in Sesse & Mocinio, Icones Florae Mexicana (G).
Description 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.
Habit vine
Note 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.
Specimen 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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