1"0 i,K(;lminos.k. (I'Li.SK ka:\iii,y.) 



28. PHASEOLUS, L. Kidniv-Hkax. 

 Calyx 5-tootlRcl, tlic two u|ipcr tfcth more or loss uiiitttl. Kiil of the corolla 

 spirally loikd or twisted. Stamens tliadelplious. Legume linear or falentc, 

 few- many-seeded. — Twining or prostrate iierbs, with trifoliolatc stipellatc 

 leaves. Flowers eommonly large, racemcd, or clustered at tlie summit of the 

 axillary peduncles. 



* Floireis scattered in lonrj racemes : legumes sci/milar-sliaped. 



1. P. perennis, Walt. Stem climl)in<r, ])ul)esecnt; leaflets ovate, acute, 

 entire, membranaceous ; racemes often hraiicliing, twice as Ion;;; as the lea\es. — 

 Low woods and margins of fields, Florida to Mississippi, and northward. July 

 and August. 1J. — Leaflets 2' -4' long. Flowers purple. 



2. P. sinuatUS, Xutt. Stem prostrate, smoothish ; leaflets small (1' long), 

 romulish or 3-lol)eil, strongly reticulate, rather rigid ; racemes 0-8 times as long 

 as the leaves, solitary, simple. — Dry sand ridges in the pine barrens. Florida. 

 July and August, y. — Stem 8° -12° long. Flowers pale jnn-ple. 



* * T'lowers clustered at tlic summit of the peduncles : legume linear, iiearlif terete ; 

 !<(cd scurfij. (Stkophostylks, J-^ll.) 



3. P. diversifolius, IVrs. Annual ; stems prostrate or trailing, rough- 

 hairy ; leaflets ovate, entire or 2 - .3-lobed ; peduncles twice as long as the leaves. 

 — Sandy soil, Florida to Mississippi, and northward. June - September. — 

 Stems 2° -4° long. Corolla ])urple, withering greenish. 



4. P. helvolus, L. Perennial, smooth or hairy ; stems prostrate, leaflets 

 varying from ovate to oblong-linear, rarely 3-lobed ; peduncles 3-6 times as 

 long as the leaves. — Woods and margins of fields, Florida to Mississippi, and 

 northward. June - September. — Corolla pale purple. 



29. 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 in- 

 cluded in the keel, diadelphous, and with the style bent upward- Style hairy 

 above, appcndaged below the stigma. Legume nearly terete, somewhat torulosc, 

 the seeds separated by cellular tissue. — Twining herbs, Avith trifoliolatc leaves, 

 and racemose axillary flowers. 



1. V. glabra, Savi. Annual, hirsute ; leaflets ovate or ovate-lanceolate ; 

 raecmes on stout peduncles longer than the leaves ; flowers yellow, crowded ; 

 legume hirsute. (Dolichos luteolus, Jactj.) — Brackish marshes, Florida to 

 South Carolina, and west to Mississippi. July - September. 



30. ERYTHRINA, L. 



Calyx tubular-campanulat(>, truncate, toothless. Vexillum narrow, straight, 

 elongated. Keel and wings very small. Stamens and style partly exserted. 

 Legume stipitate, torulosc, partly dehiscent. — Trees, shrubs, or rarely herbs, 

 often armed with prickles. Leaves trifoliolatc, the terminal leaflet long-petiolu- 

 late. Flowers showy, scarlet, in long racemes. 



