PERKINS THE LEGUMINOSAE OF PORTO RICO. 21/ 



rather shorter llian the standard; keel almotiL as lung as the wings, truncate, or beaked 

 at the tipj but the point not spiral; upper Ktaniens free, the others united ; ovary sessile, 

 niLihiovulate; style filiform , dilated upwards, longitudinally bearded on the inner 

 side upwards; stigma very o!)lique; pod linear, straight or slightly recurved, subterete, 

 2-valved, filled within between the seeds; seeds reniform, quadrate. — Herbs, either 

 pioatrate and trailing or twining or more rarely somewhat erect; leavers pinnate; loafl<^ts 

 3, stipellate; stipules usually persistent, rarely produced below their insertion; flowers 

 gn^enish yellijw, more rarely purple, in axillary racemes; bracts and bracteoles usually 

 v^Ty deciduous. 



KKY TO THK SJ'ECIKS- 



Calyx teeth lim^ar-lancc^olate, equaling the Inbc; stem an<l h^af- 

 ](Ms clothed with adpressed, strong, silky hairs; termiiud leaflet 

 lanceolate or ovate-lanceolate; pedunch'S 7.5 to 30 cm. long, 2 

 to 4-flowered; corolla nnldish-purple, 2.5 cm, long, conspicu- 

 ously veined; keel prolongc^l into an incurved 1)cak; pod linear, 

 7.5 to 10 cm. long, silky, recurved. 1. V. vexillata. 



Calyx teeth deltoid, shorter than the tube. 



Pod 3.7 to 5 cm. long, G mm. broad, slightly recurved, glab- 

 rescent or thinly silky, 8 to 10-seeded; seeds shiny, brown 

 with whit(^ bilum; terminal leaflet ovate, acute, 5 to 7.5 cm. 

 long, both sides glabrous; stipules not spurred; flowers 12 

 to 20 in a conical racenu* on a glabnnis peduncle 5 to 10 cm. 

 long; corolla pale yellow, 11 to 13 mm, long. 2. V, repeals. 



Po<l pendulous, 15 t(t 30 cm. long, imn. l)road, subcom- 

 pressed, 10 to 15-see<lcd, slightly torulose wln^n fully 

 mature<l; seeds whit(^, red, or black; terminal leaflet 

 roundish or ovate, 7.5 to 15 cm, long, both sides glabrous; 

 stipules comparatively large, distinctly spurred; flowers in 

 fi to 12-no\vcred racemes, on glabrous peduncles 15 to 30 

 cm, long; corolla yellow or reddish, 2.5 cm. deep. 3. V. nngineuJala. 



I. Vigna vexillata (Tj.) A. llich. 



(Urban, 310.) 



Stem herbaceous, wide climbing; txTmiiial h'aflet 5 to 7.5 cm. long; pdiolule ] to 

 1.8 cm. long, flowers wbit<» inside, becoming l)hie; calyx 1 to 1.5 cm. deep. 



Near Bayamon in meadows and on roadsi<les; between Aguas Cuenas and Caguais on 

 roadsides.— Cuba, Haiti, St. Vincent, Grenada. This species is widtdy spread over 



tropical Asia, Africa, and America. 



This plant on account of the obliquity of the flow<T an<l the bmgth ctf the beak Is 

 intermediate in some resp(>( ts l)etween Yigna and Phaseolus, and has been placed 

 alternately by botani.^ts in eitluT of these genera or in Dolichos, or it has been pro- 

 posed as a distinct genus. 



Local nam<',//^joi nnuinon. 



2. Vigna repens (Tj.) 0. Kuntze.^ 



(Urban, 31 J.) 



Stems very slender, wide-twining, glabrous; petiole 2.5 to 5 cm. long; stipules 

 minute, lanceolate, not spurred; leaflets 3, membranous, both sides glabrous, the end 

 one ovate, acute, 5 to 7.5 cm. long; petiolule 0.8 to 1.6 cm. long; lateral ones unequal- 

 sided; flowers up to 12 or 20 in a conical raceme on a glal)rous peduncle 5 to 10 cm. 



«Cook and Collins, p. 262, a^^ Viyna laieola. 



