TJ-.nUMINOS^. (riLSE FAMILY.) 145 



34. STROPHOSTYLES, KlI. 



Keel of the corolla with the included stamens and stvle elonpjated. stronj^lv 

 incurved, not spirally coiled, l^od linear, terete or Hattisli, straight or nearlv 

 so. Seeds quadrate or oblong with truncate ends, niealy-pulioscent or j;Iahrate ; 

 hilum linear. Flowers few, sessile and capitate clustered on the mostly long 

 peduncles. Otherwise as Phaseolus. — Stems prostrate or dimliing, moru or 

 less retrorsely hairy. Stipules and bracts striate. (Name from (rTpo(pr], a turn- 

 in;/, and (TTvKo?, (I stij/c.) I 



1. S. angulbsa, 1^11. Annual ; stems hranched, 1 -G° long; leaflets ovatn 

 to oblong-ovate (rarely linear-oblong), wilh a more or less prominent roumltd 

 lobe toward the base {the terminal 2-lobe(l), or some or all often entire, about I' 

 (6-20") long; corolla greenish-white and purplish; pod terete, 2-3' long by 

 3" wide, 4-8-seeded, nearly glabrous ; seeds oblomj, about 3" lonff, usually very 

 pubescent. (Phaseolus diversifolius, Per*-. 1*. lielvolus, />.) — Sandy shores 

 and river-banks; coast of Ma.^^s. and southward, along the Great Lakes to 

 Minn., and south to Kan. and Tex. 



Var. Missouriensis, Watson in herb. Climbing high (10-30°) ; leaves 

 often 3' long, rliomhic-ovate, rarely at all lobed ; seeds 3-4" long. — River- 

 bottoms near Indojiendence, Mo.; nearly two months later. (F. Bush.) 



2. S. peduncularis, Ell. Stems more slender, from a perennial root- 

 stock, 2-4^ long; leaflets ovate to oblong-linear, rareli/ at all lobed, V long or 

 less; pod 1^-2' long and scarreli/ 2" wide ; seeds much smaller, 1^-2" long, 

 sliort-oblong to quadrate. (Phaseolus helvolus, A/an., etc. i not L.) — Sandy 

 ground, Long Island and N. J. to Fla., west to S. Ind., Ky., and La. 



3. S. pauciflbrus, Watson in herb. Annual, slender, low-climbing, pu- 

 bescent ; leaflets oblong-lanceolate or ovate-oblong to linear, not lobed, l' long; 

 pod pubescent, V long, tiattish ; seeds as in the last, very finely mealy, soon 

 glabrate. (Phaseolus pauciflorus, Bentlt.) — Hiver-banks, Ind. to Minn., south 

 to Miss, and Tex. 



35. CENTROSEMA, DC. Spurked Bi tteuflv-Pea. 



Calyx short, 5-cleft. Corolla, etc., much as in Clitoria, but the spreading 

 standard with a spur-shaped projection on the back near the base; keel broa<l. 

 Style bearded at the apex around the terminal stigma. Pod long aiul line^ir, 

 flat, pointed with the awl-shaj)ed style, many-seeded, thickened at the edges, 

 the valves marked with a raised line on each side next the margin. — Twining 

 perennials, with 3-foliolate stii)ellate leaves, and large showy flowers. Stipules, 

 bracts, and bractlets striate, the latter longer than tlie calyx. (Xame from 

 Kfvrpov, a spur, and a-fjfja, a standard.) 



1. C. Virgini^num, IJenth. Kather rough witli minute hairs; leaflets 

 varying from oblong-ovate to lanceolate and linear, very veiny, shining; pedun- 

 cles 1 -4-flowere(l; calyx-teeth linear-awl-shaped; corolla violet, 1' long; pods 

 straight, 4-5' long. — Sandy wooils, Md. to Fla. and Ark. (Trop. Am.) 



36. CLITORIA, L. B> ttkuflv-Pi.a. 



Calyx tubular, .5-toothed. Standard much larger than the rest of the flower, 

 erect, rounded, notched at the top, not si)urred on the back; keel small, shorter 



10 



