Senna corymbosa (Lam.) H. S. Irwin & Barneby

Adipera corymbosa (Lam.) Britton & Rose
Cassia corymbosa Lam. Encycl. 1: 644. 1783. Chamaejistula corymbosa G. Don, Gen. Hist. 2: 451. 1832.
A shrub, 2-3 m. high, glabrous throughout. Stipules caducous; leaflets 2 or 3 pairs, oblong or oblong-lanceolate, 2-5 cm. long, acute, a gland borne between the lower pair of leaflets or sometimes between all the pairs; racemes axillary or sometimes paniculate; sepals very unequal; petals short-oblong, 10-12 mm. long; legume terete, 6-8 cm. long, 7-9 mm. thick, obtuse, short-stipitate; seeds obovoid, brown, shining, 4 mm. long.
Type locauity: Buenos Aires. Argentina.
Distribution; Adventive or naturalized, Georgia to Tennessee and Louisiana. Native of southern South America.

Perennial, Trees, Shrubs, Woody throughout, Stems woody below, or from woody crown or caudex, Taproot present, Stems erect or ascending, Stems less than 1 m tall, Stems 1-2 m tall, Stems greater than 2 m tall, Stems solid, Stems or young twigs glabrous or sparsely glabrate, Leaves alternate, Leaves petiolate, Extraf loral nectary glands on petiole, Stipules inconspicuous, absent, or caducous, Stipules conspicuous, Stipules setiform, subulate or acicular, Stipules deciduous, Stipules free, Leaves compound, Leaves even pinnate, Leaf or leaflet margins entire, Leaflets opposite, Leaflets 5-9, Leaves glabrous or nearly so, Inflorescences racemes, Inflorescence panicles, Inflorescence axillary, Bracts conspicuously present, Bracts very small, absent or caducous, Flowers actinomorphic or somewhat irregular, Calyx 5-lobed, Calyx glabrous, Petals separate, Petals orange or yellow, Fertile stamens 6-8, Stamens heteromorphic, graded in size, Stamens completely free, separate, Filaments glabrous, Anthers opening by basal or terminal pores or slits, Style terete, Fruit a legume, Fruit stipitate, Fruit unilocular, Fruit freely dehiscent, Fruit elongate, straight, Fruit oblong or ellipsoidal, Fruit exserted from calyx, Fruit compressed between seeds, Fruit glabrous or glabrate, Fruit 11-many seeded, Seed with elliptical line or depression, pleurogram, Seeds ovoid to rounded in outline, Seed surface smooth, Seeds olive, brown, or black.

Senna corymbosa is an ornamental plant in the genus Senna. It is also known as Argentine senna, Argentina senna, buttercup bush, flowering senna, Texas flowery senna or tree senna.