106 LEGUMINOS.fi. (PULSE FAMILY.) 



28. PHASEOLUS, L. Kidnev-Bean. 

 Calyx 5-toothed, the two upper teeth more or less united. Keel of the corolla 

 spirally coiled or twisted. Stamens diadelphous. Legume linear or falcate, 

 far -many-seeded. — Twining or prostrate herbs, with trifoliolate stipellate 

 leaves. Flowers commonly large, raeemed, or clustered at the summit of the 

 axillary peduncles. 



* Flowers scattered in lonrj racemes : legumes scymitar-shajyed. 

 1- P. perenilis, Walt. Stem climbing, pubescent; leaflets ovate, acute, 

 entire, membranaceous ; racemes often branching, twice as long as the leaves. — 

 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), 

 roundish or 3-lobed, strongly reticulate, rather rigid ; racemes 6-8 times as long 

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

 July and August. 1J. — Stem 8° - 12° long. Flowers pale purple. 



* * Flowers clustered at the summit of the peduncles : let/ume linear, nearly terete. : 

 seed scurfy. (STROPHOSTVLES, Ell.) 



3. P. diversifollUS, Fcrs. Annual ; stems prostrate or trailing, rough- 

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

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

 Stems 2° - 4° long. Corolla purple, withering greenish. 



4. P. helvolllS, 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, Sam. 



Calyx 4-toothcd, the upper tooth broader, entire or 2-clcft. Ycxillum 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, appendaged below the stigma. Legume nearly terete, somewhat torulosc, 

 the seeds separated by cellular tissue. — Twining herbs, with trifoliolate leaves 

 and racemose axillary flowers. 



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



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

 legume hirtnte. (Dolichos luteolus, Jacq.) — Brackish marshes, Florida to 

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



30. ERYTHRINA, L. 



Calyx tubular-catnpanulate, truncate, toothless. Ycxillum narrow, straight, 



elongated. Keel and wings very Bmall. Stamens and Btyle partly exserted. 

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

 often armed with prickles Leaves trifoliolate, the terminal leaflet long-pctiolu- 

 late. Flower.- Bfaowy, scarlet, in long racemes. 





