Flora of North America species comparison

of the latter are characterized as shrubs or creeping herbs, the stems with long, yellow-brown, spreading hairs (versus shorter, more appressed hairs in subsp. incana), inflorescence bracts usually 4–10 (versus 1–3) mm, and calyx lobes pilose (versus glabrate).

erect to ascending, 15–50(–80) cm, sparsely, loosely strigose.

unifoliolate;

stipules lanceolate-auriculate or triangular, decurrent on mid and distal stems, with 2 distinct lobes, (3–)5–13 mm;

blade linear, linear-lanceolate or -oblanceolate, oblong, or elliptic, narrower distally, 45–100 mm, length (2.5–)4–10 times width, surfaces strigose abaxially, glabrous adaxially.

(1 or)2–5(–12)-flowered, terminal, subterminal, or lateral, 6–25 cm;

bracts persistent, subulate-triangular.

calyx broadly cylindrical, 6–9 mm, lobes triangular-lanceolate, glabrous or slightly puberulous;

corolla bright yellow, 8–12 mm.

15–25(–30) × 7–10 mm, glabrous.

subspecies of Crotalaria incana are native to southeast Africa, where they are partially sympatric.

purpurascens (Lamarck) Milne-Redhead occurs also in Madagascar.

= 32.