suffruticose, erect, thinly strigillose; branches virgate, angular-furrowed; leaves subsessile, 2–3 jugate; leaflets linear-oblong or sublanceolate, mucronulate, strigillose beneath, the terminal sessile or somewhat petioled; stipules subulate; racemes on very long, slender, angular peduncles, many flowered; bracts minute; calyx-lobes shortly subulate, subcanescent; petals glabrous; legumes linear, terete, straight, pendulous, thinly strigillose. 18 inches to 2 feet high, slender, with a few long, simple, laxly leafy branches. Leaves 2–3 inches apart, the common petiole 1/2– 3/4 inch long, bearing the lowest pair of leaflets almost at its base. Leaflets 3/4–1 inch long, 1/2 line wide, glabrous above, paler and thinly strigillose beneath. Peduncles 6–8 inches long, erect, floriferous beyond the middle. Flowers pale, pinkish-purple; the flower-buds very acute. Ovary canescent, pluri-ovulate. Legume 1 1/4–1 1/2 inch long. In Drege's specimens the leaflets are complicate, subacute at each end and somewhat lanceolate; in Dr. Sutherland's they are expanded, obtuse but mucronulate, and more oblong, the terminal leaflet not quite sessile: in other respects the plants are identical. Var. β. has very narrow leaflets, and is altogether depauperated, resembling some of the weaker forms of I. glaucescens; but it has the glabrous petals and long peduncles of the present species.
