23G FLORA OF TEXAS. 



PHASEOLUS, L. Kidney Beax. 



Calyx 5-toothed, the 2 upper teeth more or less united ; 

 keel of the corolla spirally coiled or twisted ; stamens dia- 

 delplious; legume linear or falcate, few-many-seeded. — 

 Twining or prostrate lierhs, with trifoliolate stipellate 

 leaves ; jioicers commonly large, racemed, or clustered 

 at the summit of the axillary peduncles. 



* Flowers scattered in long racemes ; legumes scymetar -shaped. 



P. PERENNis, Walt. Stem climbing, pubescent ; leaflets 

 ovate, acute, entire, membranaceous; racemes often branch- 

 ing, twice as long as the leaves. Perennial ; flowers pur- 

 ple ; leaflets 2'-4' long. 



*♦ Flowers clustered at the summit of the peduncle ; legumes linear, nearly terete ; 



seed scurfy. 



P. HELYOLUS, L. >S'/<???? 5 prostrate; /eq^e/.s varying from 

 ovate to oblong-linear; smooth or hairy; peduncles 3-6 

 times as long as the leaves ; corolla purple. 



VIGNA, Savi. 



Calyx 4-toothed, the upper tooth broader, entire or 

 2-cleft; vexillum depressed - orbicular, with thickened 

 knobs near the base; keel not twisted; stamens included 

 in the keel, diadelphous, and with the style bent upward ; 

 style hairy above, appendaged below the stigma; legume 

 nearly terete, somewhat torulose, the seeds separated by 

 cellular tissue.— Twining lierhs, with trifoliolate leaves and 

 racemose; ^xiWdirj floioers. 



V. GLABRA, Savi. Annual hirsute: leaflets ovate or 

 ovate-lanceolate; racemes on stout peduncles longer thsin 

 the leaves ; floiuers yellow, crowded. 



