Chapter V: HIRSUTA, Koch. Peduncles 3--6-flowered; leaflets 6--8 pairs,

truncate; calyx-teeth equal; corolla bluish; _pods oblong, 2-seeded, hairy_.--N. Brunswick to Mass. and Va. (Nat. from Eu.)

[*][*][*] _Perennial; peduncles elongated; calyx-teeth unequal; pod several-seeded._

1. V. Cracca, L. Downy-pubescent; _leaflets 20--24, oblong-lanceolate, strongly mucronate; spikes densely many-flowered_, 1-sided; flowers blue, turning purple, 6'' long, reflexed; calyx-teeth shorter than the tube.--Borders of thickets, Newf. to N. J., west to Ky., Iowa, and Minn. (Eu.)

2. V. Caroliniana, Walt. Nearly smooth; _leaflets 8--24, oblong, obtuse, scarcely mucronate; peduncles loosely-flowered_; flowers small, more scattered than in the preceding, whitish, the keel tipped with blue; calyx-teeth very short.--River-banks, Ont. and N. Y. to Ga., west to Minn. and Kan.

3. V. Americana, Muhl. Glabrous; _leaflets 10--14, elliptical or ovate-oblong_, very obtuse, many-veined; _peduncles 4--8-flowered_; flowers purplish (8'' long).--Moist soil, N. Y. and N. J., to Kan., Minn., and westward.--Var. LINEARIS, Watson, a low form with linear leaflets, occurs in Kan. and Neb., and is common westward.

31. LATHYRUS, Tourn. VETCHLING. EVERLASTING PEA.

Style flattish, dilated and flattish (not grooved) above, hairy along the inner side (next the free stamen). Sheath of the filaments scarcely oblique at the apex. Otherwise nearly as in Vicia.--Our species are perennial and mostly smooth plants, the rhachis of the leaves in some not produced into a tendril. ([Greek: La/thyros], a leguminous plant of Theophrastus.)

[*] _Tendrils present; stipules large and broad; leaflets 3--5 pairs._

1. L. maritimus, Bigelow. (BEACH PEA.) Stout (1 deg. high or more); _stipules broadly ovate and halberd-shaped, nearly as large as the leaflets_, the lower lobe larger and usually coarsely toothed; leaflets _thick_, ovate-oblong (1--2' long); peduncles a little shorter than the leaves, 6--10-flowered, _flowers large_ (9'' long), _purple_.--Seashore from N. J. and Oregon to the Arctic Sea; also on the Great Lakes. (Eu.)

2. L. ochroleucus, Hook. Stem slender (1--3 deg. high); _stipules semi-cordate, half as large as the thin ovate leaflets_; peduncles 7--10-flowered; _flowers smaller, yellowish-white_.--Hillsides, N. Eng. to Minn., Iowa, and westward.

[*][*] _Tendrils present; stipules narrow, semi-sagittate, acuminate._

[+] _Flowers purple; leaflets several pairs._

3. L. venosus, Muhl. _Stout_, climbing, usually somewhat downy; stipules very small and mostly slender; _leaflets 4--6 pairs, oblong ovate_, mostly obtuse (about 2' long); _peduncles many-flowered_; flowers 6--8'' long.--Shady banks, Penn. to Ga., west to Kan. and Minn.

4. L. palustris, L. _Slender_, glabrous or somewhat pubescent; stem often winged; stipules lanceolate, sharp-pointed at both ends; _leaflets 2--4 pairs, narrowly oblong to linear, acute_ (1--2' long); _peduncles 2--6-flowered_; flowers 6'' long.--Moist places, N. Scotia to N. J., and westward across the continent. (Eu.)

Var. myrtifolius, Gray. Stipules usually broader and larger; leaflets ovate to oblong (1' long or less).--Same range, and extending south to N. C.

[+][+] _Flowers yellow; leaflets a single pair._