LEGUMINOS^. 59 



15. LATH'VRCS, L. EVERLASTING PEA. 



1. L. marit'imus, Bigel. (Beach Pea.) Stem stout, aboul 

 a foot tigh. Leaflets 8-16, oval or obovate. Stipules broad- 

 ly halberd-shaped, about as large as the leaflets. Flowers 

 large, purple. — Sea-ooast, and shores of the Great Lakes. 



2. L. veno'sus, Muhl. (Veiny E.) Stem 2-3 feet high. 

 Leaflets 10-14. Stipules very small, slender, half arrow- 

 shaped. Flowers numerous. — Shady banks, chiefly west- 

 ward and southward. 



3. L. oehpoleu'eus, Hook. (Pale E.) Stem slender. 

 Leaflets 6-8, smooth and glaucous. Stipules half heart- 

 shaped, large. Corolla yellowish-white. — Chiefly northward. 



4. L. palus'triS, L. (Mabsh E.) Stem slender, wing- 

 margined. Leaflets 4-8, lanceolate, linear, or narrowly 

 oblong, sharply mucronate. Stipules small, half arrow- 

 shaped. Corolla blue-purple. — Moist places. Var. mypti- 

 f olius has oblong-lanceolate leaflets, and pale purple flowers. 

 Upper stipules much larger than the lower ones. 



16. A'PIOS, Boerhaave. Groukd-Nut. Wild Bean. 

 A. tubero'sa, Moench. Flowers brown-purple. — A com- 

 mon twining plant in low grounds. 



17. STROPHOSTT'LES, Ell. 



5. angnlo'sa, Ell. {Phase'olus diver sif olius, Pers.) An- 

 nual. Stems 1-6 feet long. Leaflets orate to oblong-ovate 

 often with a rounded lobe at the base. Flowers greenish- 

 white and purplish, few, sessile, clustered on the long 

 peduncles. — S. W. Ontario chiefly. 



18. AMPHICAKPiE'A, EU. HOG Pea-Nut. 



A. mono'iea, Nutt. Flowers white or purplish. — ^Moist 

 thickets and river-banks. 



19. DESMOnmill, DC. Tick-Trefoil. 



* Fod raised on a stalk much surpassing^ the calyx, the latter slightly 

 toothed. Stipules bristle-form. 



1. D. nudiflo'rum, DC. Stem smooth, 4^ inches high. 



Leaves crowded at the summit of sterile stems. Flowers in 



