herbaceous, slender, procumbent, wholly albo-strigose; stems filiform; leaves pinnate; leaflets 7–9, alternate, cuneate-obovate, mucronulate, densely cano-strigose on both sides; stipules subulate; racemes spicate, on long peduncles, many flowered, elongating; bracts minute; calyx white, its segments setaceo-subulate; petals hoary; legumes short, 4–5 seeded, subterete, straight, pendulous, canescent. Stems 1–2 feet long, terete, slender, subsimple, or branched near the base, probably prostrate, the habit resembling that of a Tribulus. Leaves 1–1 1/2 inch long; leaflets 4–5 lines long, 2–3 lines wide. Flowering peduncles 3, fruiting 5 inches long; flowers small, subsessile. Legumes 4–5 lines long. Every part of the plant is clothed with dense, white, appressed, short bristles, by which character and the more diffuse habit it is known from I. alternans.
