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

Flora Data (Last Modified On 9/30/2013)
Species Mucuna urens (L.) DC.
PlaceOfPublication Prodr. 2: 405. 1825.
Synonym Dolichos urens L., Syst., ed. 10: 1162. 1759. Based on Zoophthalmum P. Br., Hist. Jam. 295. 1756. TYPE: Browne, Jamaica, not seen. Dolichos altissimus Jacq., Sel. Stirp. Amer. 203, tab. 182, fig. 85. 1763. TYPE: not seen. Stizolobium altissimum (Jacq.) Pers., Syn. PI. 299. 1807. Mucuna altissima (Jacq.) DC., Prodr. 2: 405. 1825.
Description High climbing woody vine, stems slender, glabrate. Leaves trifoliolate, leaf- lets mostly ca. 10 cm long, 5 cm wide, ovate, apically acuminate, basally obtuse or rounded, the lateral leaflets oblique, costate with 3 prominent veins at the base and 1-3 prominent veins distally on each side, glabrescent, more so above, be- neath with scattered short hair bases persisting, the leaf base sometimes with a few stouter hairs; petioles somewhat shorter or longer than the terminal leaflet; petiolules ca. 10 mm long, drying dark; stipels caducous, stipules scale-like, 2-3 mm long, pilose. Inflorescence pendulous, the peduncle elongate, slender, gla- brate, the rachis thick, ca. 3 cm long; appressed pubescent, striate, the pedicels slender, 4-5 cm long, stout in fruit, appressed pubescent; bracts not observed. Flowers pale greenish white or yellow, the calyx cupular, the cup ca. 9 mm long, the upper teeth united into a rounded or emarginate crest, ca. 10 mm long, the lower pair of teeth deltoid to acute, 6-7 mm long, the lower tooth linear, 11-13 mm long, appressed velutinous outside and inside, a few coarse ?stinging hairs on the cup outside; corolla ca. 4 cm long, the standard, ca. 2.5 cm long, the wings clavate falcate, ca. 8 mm wide at the widest, exserted 8-12 mm from the standard, drying dark; anthers ca. 3 mm long, basally barbate; stigma capitate tufted. Fruits oblong, becoming 20 cm long, 6 cm wide, the surface and margin with conspic- uous irregular 5-10 mm high lamellae, not constricted between the seeds, copi- ously hispid with reddish brown stout stinging hairs, the beak slender, 1-2 mm thick, the stipe slender, 2-3 mm thick, 0-2 cm long; falsely septate between the seeds; seeds not seen.
Habit vine
Note This species is distinct from other Panamanian species of Mucuna in its pod, which is larger and longer with irregular lamellas, and which is sometimes beaked and stipitate. It is also distinct in its calyx, the lower tooth of which is linear deltoid and elongate. Identifying this material with M. urens, which is an Antillean species, is done with some hesitation; no good fruiting material of typical M. urens was seen, and the calyx teeth are longer than on most Antillean material. The pedicels are also much longer than those on Antillean material seen. The above description was made from Panamanian and Costa Rican material at MO. All collections of this species except for that from El Valle by Seibert are from upland Chiriqui, 1,500-2,000 m, an area from where no other species of Mucuna have been reported.
Elevation 1,500-2,000 m
Specimen CANAL ZONE: Gatfin Station, Hayes 134 (GH). CHIRIQUf: Finca Collins, Boquete, Blum & Dwyer 2531A (GH, MO, SCZ). Cerro Horqueta, 4500-7000 ft, Blum & Dwyer 2605 (FSU, SCZ); Dwyer et al. 450 (MO); Dwyer & Lallathin 8738 (GH, MO). Boquete, Ebinger 740 (MO); Kirkbride 156 (MO). Finca LUrida to Pefia Blanca, 1750-2000 m, Woodson & Schery 324 (MO). Bajo Mono and Quebrada Chirquero, 1500 m, Woodson & Schery 517 (MO). Casita Alta, Volcdn de Chiriqui, Woodson et al. 969 (GH, MO, US). COCLE: El Valle de Ant6n, 500-700 m, Seibert 434 (GH, MO). DARIEN: Between Cand and Boca de Cupe, Stern et al. 628 (GH, MO).
 
 
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