Senna aculeata (Benth.) H. S. Irwin & Barneby

Echinocassia aculeata (Pohl) Britton & Rose
Cassia aculeata Pohl; Benth. in Mart. Fl. Bras. 15^: 128. 1870. Chamaesenna aculeata Pittier, Arb. & Arb. Legum. 131. 1928.
A branching shrub, 2-3 m. high, the glandular pubescence short, spreading. Stipules broadly ovate, deeply cordate, strongly veined, spiimlose-mucronate, 2.5-5 cm. long; leaflets 10-14 pairs, obliquely oblong to lanceolate, acute or obtuse, glabrous, subchartaceous, 3-5 cm. long, the terminal spinule 2-3 mm. long; racemes several-many-flowered; bracts membranous, obovate, 1-2 cm. long, caducous; pedicels stout, 1-1.5 cm. long; sepals ovate, obtuse, about 1 cm. long; petals colorveined, a little longer than the sepals; legume broadly linear, 7-10 cm. long, 1.5-2 cm. wide; seeds 5-6 mm. long.
Type locality: Near Curralinho. Goyaz, Brazil.
Distribution: Cuba. Venezuela to Bolivia, Brazil and Paraguay.