43. Gymnocladus. Leaves all doubly pinnate. Calyx-tube elongated, at its summit bearing 5 petals resembling the calyx lobes. Stamens 10. 44. Gleditschia. Thorny; leaves simply and doubly pinnate. Calyx tube short; its lobes, petals, and the stamens 3--5. SUBORDER III. Mimoseæ. (MIMOSA FAMILY.) Flower regular, small. Corolla valvate in æstivation, often united into a 4--5-lobed cup, hypogynous, as are the (often very numerous) exserted stamens. Embryo straight. Leaves twice pinnate. 45. Desmanthus. Petals distinct. Stamens 5 or 10. Pod smooth. 46. Schrankia. Petals united below into a cup. Stamens 8 or 10. Pod covered with small prickles or rough projections. 1. BAPTÍSIA, Vent. FALSE INDIGO. Calyx 4--5-toothed. Standard not longer than the wings, its sides reflexed; keel-petals nearly separate, and, like the wings, straight. Stamens 10, distinct. Pod stalked in the persistent calyx, roundish or oblong, inflated, pointed, many seeded.--Perennial herbs, with palmately 3-foliolate (rarely simple) leaves, which generally blacken in drying, and racemed flowers. (Named from βαπτίζω, _to dye_, from the economical use of some species, which yield a poor indigo.) [*] _Racemes many, short and loose, terminal, often leafy at base, flowers yellow._ 1. B. tinctòria, R. Br. (WILD INDIGO.) Smooth and slender (2--3° high), rather glaucous; leaves almost sessile, leaflets rounded wedge-obovate (½--1½´ long), stipules and bracts minute and deciduous, pods oval-globose, on a stalk longer than the calyx.--Sandy dry soil, N. Eng. to Fla., west to Minn. and La. [*][*] _Racemes fewer, opposite the leaves._ [+] _Flowers yellow._ 2. B. villòsa, Ell. Sometimes soft-hairy, usually minutely pubescent when young, erect (2--3° high) with divergent branches; leaves almost sessile, leaflets wedge-lanceolate or obovate, lower stipules lanceolate and persistent, on the branchlets often small and subulate, racemes many-flowered; pedicels short; bracts subulate, mostly deciduous; pods ovoid-oblong and taper-pointed, minutely pubescent.--Va. to N. C. and Ark. [+][+] _Flowers white or cream-color._ 3. B. leucophæ̀a, Nutt. _Hairy, low_ (1° high), with _divergent branches_; _leaves almost sessile_, leaflets narrowly oblong-obovate or spatulate; _stipules and bracts large and leafy, persistent; racemes long_ (often 1°), _reclined; flowers on elongated pedicels, cream-color_; pods pointed at both ends, hoary.--Mich. to Minn., south to Tex. April, May. 4. B. leucántha, Torr. & Gray. _Smooth_; stems, leaves, and racemes as in n. 6; _stipules early deciduous; flowers white; pods oval-oblong, raised on a stalk fully twice the length of the calyx_.--Alluvial soil, Ont. and Ohio to Minn., south to Fla. and La.