Crotalaria laburnifolia L.

Erect perennial bushy herb, scarcely woody, up to 6–20 dm. tall.. Branches glabrous to thinly appressed puberulous.. Leaves 3—foliolate; leaflets variable, narrowly oblong to elliptic or elliptic-obovate, up to 10–105 mm. long, 4–55 mm. wide, bluntly pointed to rounded or emarginate at the apex, glabrous or puberulous on the lower or both surfaces; petiole constricted at the base, up to 10–125 mm. long.. Stipules absent.. Racemes lax, up to 3–33(–50) cm. long, with few to generally numerous flowers; bracts subulate, up to 4 mm. long, rather persistent; bracteoles inserted near the middle of the pedicel, filiform, up to 2 mm. long; calyx 12–17 mm. long, basally narrowed into a prominent receptacle, glabrous or sparsely puberulous; upper and lateral lobes on either side often slightly cohering in the young flowers, becoming free (except sometimes at the very tip) in the mature flowers, narrowly triangular, longer than the tube.. Standard ovate, yellow, often marked red-brown and glabrous outside; wings a little over half to three-fourths as long as the keel; keel strongly rounded, with a well-developed straight truncate upwardly directed untwisted beak, (19–)22–30 mm. long, often flecked or flushed maroon or reddish-brown.. Pod oblong-clavate to subcylindrical, narrowed or abruptly contracted into the slender 1·7–9·5 cm. long stipe, ± 4·5–15 cm. long, 1–1·3 cm. across, glabrous, often mottled maroon or reddish-brown, ± 16–42-seeded.. Seeds oblique-cordiform, 4–5 mm. long, obscurely and sparsely papillose, ochre or brown.

A tropical plant. It grows in the tropics. It can grow in areas which have moderate moisture or are dry. It needs an average, well-drained soil. It needs full sun. In tropical Queensland it grows from sea level to 550 m altitude. It suits hardiness zones 9-12.

Plants are grown from seeds. The seeds need treatment to break the hard seed coat. It can be grown from cuttings.