ORDER XLIII. LEGUMINOS.fi. 273 



Genus II.— VI'CIA. Tourn. 16—10. 

 (From vindo, to bind; the tendrils binding other plants.) 



Calyx tubular, 5-toothed, the two upper teeth shortest. Style 

 bent ; outside of the style, near the summit, villous. Legumt 

 many-seeded. Leaves pinnate. Leaflets in several pairs. Pet- 

 ioles extended into tendrils. 



1. V. Carolinia'na, (Walt.) Stem much branched, running over shrubs. 

 Leaflet* 8 — 12, glabrous, oblong-]inear, obtuse, mucronate, petiole ex- 

 tended into a 3-cleft tendril. Flowers numerous, in loose racemes. 

 Calyx teeth short and obtuse. Legume oblong, mucronate, coriaceous. 

 Seeds nearly globular, dark-colored. — White or blue. If. April — May. 

 Along the margins of swamps. 2 — 8 — 10 feet. 



2. V. acutifo'lia, (Ell.) Stem somewhat angled, glabrous. Leaflets 

 3 — 6, glabrous, usually acute, linear, petiole terminating generally in an 

 undivided tendril. Stipules linear-lanceolate, entire. Flowers in ra- 

 cemes, longer than the leaves, 3 — 7 -flowered ; lower teeth of the calyx 

 ovate-lanceolate, upper ones very short. Legume somewhat falcate, 

 mucronate, 4 — 10-seeded, seeds small. — White, tinged with blue. 0. 

 April. Rich soils. Common. 4 — 6 feet. 



Genus III— ER'VUM. L. 16—10. 

 (From a Celtic word meaning tilled land.) 



Calyx deeply 5 -cleft, hairy, with nearly equal segments, lin- 

 ear, acute, about equal in length to the corolla. Stigma glabrous. 

 Legume 2 — 4-seeded, oblong, seeds nearly globose. Petioles 

 produced into tendrils. Peduncles axillary. 



1. E. hirsu'tum, (L.) Stem much branched, diffuse. Leaflets 8 — 20, 

 linear-lanceolate, truncate, or retuse at the apex. Stipules subulate. 

 Petioles terminating in divided tendrils. Peduncles 3 — 6-flowered near 

 the summit. Legumes hairy, obliquely truncate, drooping, 2-seeded. — 

 Bluish-white. %. March — April. On cultivated grounds. 



Genus IV.— LATH'YRTJS. L. 16—10. 

 (From the Greek latliuros, a kind of pulse.) 



Calyx campanulate, 5-cIeft, the 2 upper segments short. 

 Style flat, villous on the upper side, widened toward the sum- 

 mit. Legume oblong, several-seeded. Peduncles axillary. 

 Pciioles produced into tendrils. 



1. L. pusil'lus, (Ell.) A slender branching vine, glabrous, angled 

 and winged. Leaflets a single pair, linear-lanceolate, acute at each end, 

 slightly mucronate. Stipules large, acute, sagittate, slightly falcate. 

 Legume 11 — 15-seeded. — Purple. 0. April — May. Common. 



Tribe II— PHASEOLE^E. 



Stamens diadelphous. Legume continuous, sometimes with 

 partitions between the seeds. Usually twining plants. Leaves 

 trifoliate or unequally pinnate. 



