Root perennial, stem glabrous or nearly so, stout, somewhat fleshy and slightly glaucous, angled, decumbent, 1 to 2 feet long with broad foliaceous, hastate, pointed stipules 1 to 2 inches long. Leaves nearly sessile, pinnate, the rachis terminating in a slender, forked tendril; leaflets six to twelve, oblong, oval or obovate, blunt and mucronulate at the apex, usually narrowed at the base, 1 to 2 ½ inches long, one-half to three-fourths of an inch wide. Flowers six to ten on peduncles 3 to 4 inches long, purple, three-fourths to 1 inch long; calyx teeth often ciliate. Fruit a sessile, linear-oblong, nearly glabrous, veined pod, 1 ½ to 3 inches long and about one-half of an inch wide.
Memoir 15 N. Y. State Museum
Beach Pea; Seaside Pea - Lathyrus maritimus