Longbeak Rattlebox

Perennial, Trees, Shrubs, Taproot present, Nodules present, Stems erect or ascending, Stems 1-2 m tall, Stems greater than 2 m tall, Stems solid, Stems or young twigs sparsely to densely hairy, Leaves alternate, Leaves petiolate, Stipules inconspicuous, absent, or caducous, Stipules conspicuous, Stipules green, triangulate to lanceolate or foliaceous, Leaves compound, Leaves palmately 2-3 foliate, Leaf or leaflet margins entire, Leaflets 3, Leaves hairy on one or both surfaces, Inflorescences racemes, Inflorescence terminal, Inflorescence leaf-opposed, Inflorescence or flowers lax, declined or pendulous, Bracts conspicuously present, Bracteoles present, Flowers zygomorphic, Calyx 5-lobed, Calyx hairy, Petals separate, Corolla papilionaceous, Petals orange or yellow, Banner petal suborbicular, broadly rounded, Wing petals narrow, oblanceolate to oblong, Keel abruptly curved, or spirally coiled, Stamens 9-10, Stamens or anthers dimorphic, alternating large and small, Stamens monadelphous, united below, Filaments glabrous, Style terete, Style hairy, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit inflated or turgid, Fruit hairy, Fruit 11-many seeded, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

Crotalaria longirostrata, the chipilín, is a perennial legume that is native to Mexico and Central America. Other common names include chepil, chepilin, chipilin and longbeak rattlebox.