Diphysa sennoides Benth. & Oerst.

Diphysa sennioides Benth.; Benth. & Oerst. Vidensk Meddel. 1853: 12. 1853.
A shrub or small tree; branches sparingly hirsute-strigose, in age straw-colored; stipules linear or lance-linear, falcate, 5-7 mm. long; leaves 5-10 cm. long; leaflets 11-25, oblong to oval, mucronate, rounded at each end, 8-15 mm. long, glabrous or sparingly strigose on the veins; rachis slightly pubescent, usually with more or less numerous bristles which develop into slender prickles; racemes 3-5 cm. long, 3-5-flowered; bracts linear; bractlets oblanceolate, acute; calyx glabrous, 6-7 mm. long; lobes 3-3.5 mm. long, the upper two rounded-ovate, the lateral ones triangular, acute, the lowest one lanceolate, slightly longer; corolla yellow, 12 mm. long; pod 3-9 cm. long, 2 cm. broad, glabrous or nearly so; stipe fully 1 cm. long; seeds lightbrown, 6-7 mm. long, 4 mm. broad.
Type locality: Zimapan, Hidalgo.
Distribution: Veracruz to San Luis Potosi, Jalisco, and Oaxaca.