LEGUMIXOS-<£. (PULSE FAMILY.) 103 



and mucronate at the apex ; pod linear, several-seeded. — Cultivated fields and 

 waste places; both the common form and the Tar. angustif6lia, with longer 

 and narrow leaflets. (Adv. from Eu.) 



# # Annual: peduncles elongated : flowers small. (Species of Ervum, L.) 



2. V. TETiiASPEKMA, L. Peduncles 1 - 2-floicered ; leaflets 4-6 pairs, 

 linear-oblong, obtuse ; calyx-teeth unequal ; pods narrowly oblong, 4-seeded, smooth. 



— Waste or open places, near the coast. — An insignificant plant, 6'-12' high, 

 with whitish flowers. (Nat. from Eu.) 



3. V. niRStJTA, Koch. Peduncles 3 - 6-flouxred ; leaflets 6-8 pairs, trun- 

 cate ; calyx-teeth equal ; pods oblong, 2-seeded, hairy. (Ervum hirsutum, L.) — 

 Massachusetts to Virginia. — A slender straggling plant, with small purplish- 

 blue flowers. (Nat. from Eu.) 



# * # Perennial : peduncles elongated ; calyx-teeth very unequal: pod several-seeded. 



4. V. Cs'iiCCa, L. Downy-pubescent; leaflets 20-24, oblong-lanceolate, 

 strongly mucronate ; peduncles densely many-flowered ; calyx-teeth shorter than the 

 tube. Borders of thickets, New England to Kentucky and northward. July. 



— Flowers blue, turning purple, h' long, one-sided in the spike, reflexed. (Eu.) 



5. V. Carols JBflfiSJa, Walt. Nearly smooth; leaflets 8-12, dlong, ob- 

 tuse, scarcely mucronate ; peduncles loosely flowered ; calyx-teeth very short. — 

 River-banks, &c. May. — Flowers more scattered than in No. 4, whitish, the 

 keel tipped with blue. 



6. V. Americana, Muhl. Glabrous; leaflets 10 - 14, elliptical or ovate- 

 oblong, very obtuse, many-veined; peduncles 4 - S-flowered. — Moist thick' t 

 New York to Kentucky and northward. June. — Flowers purplish-blue, £' 

 long. 



21. LATHYBIS, L. Vetchling. Everlasting Pea. 



Style flattish, not grooved above, hairy along the inner side (next the free sta- 

 men). Otherwise nearly as in Vicia. (Addv/jos. a leguminous plant of Thco- 

 phrastus.) — Our wild species are perennial and mostly smooth plants. 



1. Li. maratiiims, Bigclow. (Beach Pea.) Stem stout (1° high); 

 leaflets 4-8 pairs, crowded, oval or obovate ; stipules broadly halberd-shaped, 

 nearly as large as the leaflets; peduncles 6- 10-flowcred. — Sea-coast, from New 

 Jersey northward, and shore of the Great Lakes. June -Aug. — Flowers large, 

 purple. Leaflets very veiny, as also are those of the other species. (Eu.) 



2. jL. vesiOSllS, Muhl. Stem climbing (2° -5° high) ; leaflets 5 - 7 pairs, 

 scattered, oblong-ovate, often downy beneath ; stipules very small and usually slen- 

 der, half arrow-shaped; peduncles many-flowered; corolla purple. — Shady banks. 

 Michigan, Wisconsin, and southward, June. 



3. Li. odiroleucus, Hook. Stem slender (1°- 3° high); leaflets 3-4 

 pairs, ovate or oval, smooth, glaucous, thin ; stipules half heart-shaped, about half 

 as large as the leaflets; peduncles 7 - 10-flowered ; corolla yellowish-white. — Hill- 

 sides, W. Vermont to Penn., and westward and northward. July. 



4. L. palustl'is, L. (Marsh Vetchling.) Stem slender (l°-2° 

 high), often wing-margined ; leaflets 2-4 pairs, lanceolate, linear, or narrowly 



