This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Ervum hirsutum L. Sp. Pl. 738. 1753. V. Mitchelli Raf. Prec. Decouv. 37. 1814. V. hirsuta Koch, Syn. Fl. Germ. 191. 1837.
Sparingly pubescent, or glabrous, annual, much resembling the preceding species. Stipules linear, long-auriculate and sometimes toothed; leaves nearly sessile; leaflets 12-14, oblong or linear, obtuse, emarginate or truncate, mucronulate, 4"-8" long, narrowed at the base; peduncles slender, mainly shorter than the leaves, 2-6-flowered; flowers pale purplish blue, about 1 1/2" long; pod oblong, pubescent, 4"-6" long, 2-seeded.
Vicia sativa L. Sp. Pl. 736. 1753.
Annual or winter-annual, pubescent or glabrate, spreading, ascending or climbing, 1°-3° long. Stipules broad, generally sharply toothed; leaves short-petioled; leaflets 8-14, obovate, oblong or oblanceolate, obtuse, truncate or retuse and mucronate at the apex, narrowed at the base, 9"-15" long, 2"-4" wide; flowers 1 or 2 in the axils, sessile or short-peduncled, bluish-purple, 9"-15" long; calyx-teeth about as long as the tube; pod linear-oblong, glabrous, 1 1/2' - 3' long, about 4" wide, 5-10-seeded.
In fields and waste places, frequent or occasional nearly throughout our area, in the Southern States and on the Pacific Coast. Bermuda; Jamaica. Adventive from Europe. Cultivated for fodder. Native also of Asia. May-Aug.
Annual or winter-annual, glabrous or puber-ulent; stem slender, 1°-2° long. Stipules mostly half-sagittate, toothed, or entire; leaves short-petioled, or nearly sessile; leaflets 4-16, linear, lanceolate, or oblanceolate, 4"-18" long, 1'-2" wide, acute, obtuse, truncate or emar-ginate at the apex, mucronulate, those of the lower leaves commonly oblong or obovate, broader and shorter; flowers 1 or 2 in the upper axils, purple, 6"-g" long; calyx-teeth as long as the tube or shorter; pod linear, glabrous, 1-2' long, 2 1/2"-3 1/2" wide;
11. Vicia SepiumL. Bush Vetch. Wild Tare. Fier. 2623.
Vicia Sepium L Sp. Pl. 737. 1753.
Perennial by slender stolons, minutely pubescent; stem slender, 2°-3° long. Leaves short-petioled, 2-6' long; leaflets 10-18, ovate or oval, 6"-12" long, 3"-7" wide, emarginate or truncate at the apex, mucronulate, thin; stipules half-sagittate, 5" long or less; racemes in 1 or more of the upper axils, 2-6-flowered, 1/2'-1' long, nearly sessile; flowers very short-pedicelled, pale purple, 6"-10" long; calyx-teeth unequal, shorter than the tube; pod 10"-15" long, about 3" wide, glabrous.
Waste grounds, Quebec. Maine, Ontario and New Hampshire. Adventive or fugitive from Europe. Native also of Asia. Called also crow-peas. May-July.
Ervum Lens L., the lentil, distinguished from all our species of Vicia by its elongated calyx-lobes and oval, 1-2-seeded pod, is collected occasionally as a waif, not established.
41. LÁTHYRUS L. Sp. PI. 729. 1753.
Herbaceous vines, rarely erect herbs, with pinnate mostly tendril-bearing leaves, and racemose or sometimes solitary flowers. Calyx oblique or gibbous at the base, its teeth nearly equal or the upper ones somewhat shorter than the lower. Corolla nearly as in Vicia, but commonly larger. Stamens diadelphous (9 and 1), or monadelphous below. Ovary sessile or stalked; ovules generally numerous; style curved, flattened, hairy along its inner side. Pod flat, or sometimes terete, 2-valved, dehiscent, continuous between the seeds. [Ancient Greek name of some leguminous plant.]
About no species, natives of the northern hemisphere and of South America. Besides the following, about 25 others occur in the southern and western parts of North America. Type species: Lathyrus sativus L.
Leaflets 2-6 pairs.
Stipules broad, foliaceous; plant of the seashore and the Great Lakes,
Stipules half-sagittate or small, or wanting; inland plants.
Plants climbing or trailing; stipules present; pod sessile.
Leaflets ovate or oval, large; flowers 10-20.
Leaflets linear, oblong or oval, smaller; flowers 2-6.
Leaflets linear or linear-oblong; stem winged.
Leaflets oblong or oval; stem wingless.
Plants mainly erect; stipules often wanting; pod stipitate.
Leaflets lanceolate or oblong.
Flowers yellowish-white; stipules foliaceous.
Leaflets 1 pair.
Perennial introduced species.
Flowers yellow; stems wingless.
Flowers purple; stems broadly winged.
Annual; flowers purple; native species.