116 LEGUMINOSJE. (PULSE FAMILY.) 



* Flowers scattered in long racemes : legumes scimitar-shaped. 



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

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

 Low woods and margins of fields. July -August. 2/ Leaflets 2' -4' 

 long. Flowers purple. 



2. P. sinuatus, Nutt. 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 sandy pine barrens. Florida. 

 July- August. Ij. Stem 8- 12 long. Flowers pale purple. 



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

 seed scurfy. (STROPHOSTYLES, Ell.) 



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

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

 leaves. Sandy soil. June - Sept. Stems 2 - 4 long. Corolla purple, 

 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. June -Sept. Corolla 

 pale purple. 



5. P. pauciflorus, Benth. Annual, softly pubescent ; stem twining; 

 leaflets l'-l^'long, oblong-ovate, obtuse; peduncles often shorter than the 

 leaves, few-flowered; flowers small, legume broadly linear, compressed, hir- 

 sute, few-seeded ; seeds oval, smooth. Waste ground, Mississippi, Tennes- 

 see, and westward. 



28. VIGNA, SAVI. 



Calyx 4-toothed, the upper tooth broader, entire or 2-cleft. Vexillum de- 

 pressed-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 herbs, 

 with trifoliolate leaves, and racemose axillary flowers. 



1. V. luteola, Benth. Annual, smooth or hirsute: leaflets ovate or 

 ovate-lanceolate; racemes on stout peduncles longer than the leaves; flowers 

 yellow, crowded ; legume terete, hirsute. IJrackish maishes along the coast. 

 July - Sept. 



29. PEYTHRINA, L. 



Calyx tubular-campanulate, truncate, toothless. Vexillum narrow, straight, 

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

 Legume stipitate, torulose, partly dehiscent - - Trees, shrubs, or rarely herbs, 

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

 petiolulate. Flowers showy, scarlet, in long racemes. 



1. E. herbacea, L. Stems herbaceous several from a very thick root, 

 prickly, the flowering ones mostly leafless ; leaves long petioled ; leaflets ovate 

 or somewhat hastate ; vexillum lanceolate, folded ; seeds scarlet. Light 



