1. S. serícea, Nutt. Silky canescent, erect, 1° high or less; leaflets oblong-obovate, 3--6´´ long; flowers white; pods few-seeded.--Central Kan. to Col., Tex., and Ariz. 5. CROTALÀRIA, L. RATTLE-BOX. Calyx 5-cleft, scarcely 2-lipped. Standard large, heart-shaped; keel scythe-shaped. Sheath of the monadelphous stamens cleft on the upper side; 5 of the anthers smaller and roundish. Pod inflated, oblong, many-seeded.--Herbs with simple leaves. Flowers yellow. (Name from κρόταλον, _a rattle_; the loose seeds rattling in the coriaceous inflated pods.) 1. C. sagittàlis, L. Annual, hairy (3--6´ high); leaves oval or oblong-lanceolate, scarcely petioled, stipules united and decurrent on the stem, so as to be inversely arrow-shaped; peduncles few-flowered; corolla not longer than the calyx; pod blackish.--Sandy soil; Maine to Ill., Minn., Kan., and southward. 6. GENÍSTA, L. WOAD-WAXEN. WHIN. Calyx 2-lipped. Standard oblong-oval, spreading; keel oblong, straight, deflexed. Stamens monadelphous, the sheath entire; 5 alternate anthers shorter. Pod mostly flat and several-seeded.--Shrubby plants, with simple leaves, and yellow flowers. (Name from the Celtic _gen_, a bush.) G. TINCTÒRIA, L. (DYER'S GREEN-WEED.) Low, not thorny, with striate-angled erect branches; leaves lanceolate; flowers in spiked racemes.--Established on sterile hills, eastern N. Y. and Mass. (Adv. from Eu.) 7. CÝTISUS, Tourn. BROOM. Calyx campanulate, with 2 short broad lips. Petals broad, the keel obtuse and slightly incurved. Stamens monadelphous. Pod flat, much longer than the calyx. Seeds several, with a strophiole at the hilum.--Shrubs, with stiff green branches, leaves mostly digitately 3-foliolate, and large bright yellow flowers. (The ancient Roman name of a plant, probably a Medicago.) C. SCOPÀRIUS, Link. (SCOTCH BROOM.) Glabrous or nearly so (3--5° high); leaflets small, obovate, often reduced to a single one; flowers solitary or in pairs, on slender pedicels, in the axils of the old leaves, forming leafy racemes along the upper branches; style very long and spirally incurved.--Va. and southward. (Nat. from Eu.) 8. LUPÌNUS, Tourn. LUPINE. Calyx very deeply 2-lipped. Sides of the standard reflexed; keel scythe-shaped, pointed. Sheath of the monadelphous stamens entire; anthers alternately oblong and roundish. Pod oblong, flattened, often knotty by constrictions between the seeds. Cotyledons thick and fleshy.--Herbs, with palmately 1--15-foliolate leaves, stipules adnate to base of the petiole, and showy flowers in terminal racemes or spikes. (Name from _Lupus_, a wolf, because these plants were thought to devour the fertility of the soil.)