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, 30–90 cm, strigose to strigose-sericeous.

unifoliolate;

stipules sometimes absent, setaceous, not decurrent on stem, 1–2 mm;

blade obovate to spatulate or oblanceolate, 30–80 mm, length 2.2–3(–4) times width, surfaces strigose abaxially, glabrous adaxially.

5–24-flowered, terminal, subterminal, or lateral, 10–20(–30) cm;

bracts caducous, linear, 2–3 mm.

calyx broadly cylindrical, 12–15 mm, basally truncate, lobes triangular-lanceolate, glabrous or slightly puberulous;

corolla bright yellow, with prominent reddish lines to strongly red-tinted, 20–25 mm.

25–40(–50) × 10–14 mm, glabrous.

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

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

= 16.