Calyx tubular, 5-toothed. Standard much larger than the rest of the flower, erect, rounded, notched at the top, not spurred on the back; keel small, shorter than the wings, incurved, acute. Stamens monadelphous below. Style bearded down the inner face. Pod linear-oblong, flattish, knotty, several-seeded, pointed with the base of the style.--Erect or twining perennials, with mostly pinnately 3-foliolate stipellate leaves, and very large flowers. Peduncles 1--3-flowered; bractlets opposite, striate. (Derivation recondite.) 1. C. Mariàna, L. Low, ascending or twining, smooth; leaflets oblong-ovate or ovate-lanceolate; stipules and bracts awl-shaped; peduncles short; the showy pale-blue flowers 2´ long.--Dry banks, N. Y. to Va. and Fla., west to Mo. and Tex. 37. AMPHICARPÆ̀A, Ell. HOG PEA-NUT. Flowers of 2 kinds; those of the racemes from the upper branches perfect, but seldom ripening fruit; those near the base and on filiform creeping branches with the corolla none or rudimentary, and few free stamens, but fruitful. Calyx about equally 4- (rarely 5-) toothed; bractlets none or minute. Keel and wing-petals similar, almost straight; the standard partly folded round them. Stamens diadelphous. Style beardless. Pods of the upper flowers, when formed, somewhat scymetar-shaped, stipitate, 3--4-seeded; of the lower ones commonly subterranean and fleshy, obovate or pear-shaped, ripening usually but one large seed.--Low and slender perennials; the twining stems clothed with brownish hairs. Leaves pinnately 3-foliolate; leaflets rhombic-ovate, stipellate. Flowers in simple or compound racemes, purplish. Bracts persistent, round, partly clasping, striate, as well as the stipules. (Name from ἀμφί, _both_, and καρπός, _fruit_, in allusion to the two kinds of pods.) 1. A. monòica, Nutt. Leaflets thin, ½--2´ long; racemes nodding; calyx of upper flowers 2´´ long, the ovary glabrous except the hairy margin; pod 1´ long; ovary and pod of the rudimentary flowers hairy.--Rich damp woodlands, common. Aug., Sept. 2. A. Pítcheri, Torr. & Gray. Leaflets usually 2--4´ long; rhachis of the racemes usually villous; calyx 3´´ long, the teeth acuminate; ovary hairy.--Western N. Y. to Ill., Mo., La., and Tex. The upper flowers more commonly fertile; apparently producing subterranean fruit but rarely. 38. GALÁCTIA, P. Browne. MILK-PEA. Calyx 4-cleft; the lobes acute, the upper one broadest, entire. Keel scarcely incurved. Stamens diadelphous or nearly so. Style beardless. Pod linear, flat, several-seeded (some few of them rarely partly subterranean and fleshy or deformed).--Low, mostly prostrate or twining perennial herbs. Leaflets usually 3, stipellate. Flowers in somewhat interrupted or knotty racemes, purplish; in summer. (Name from γάλα, -ακτος, _milk_; some species being said to yield a milky juice, which is unlikely.)