Senna crotalarioides (Kunth) H. S. Irwin & Barneby

Earleocassia vogeliana (vSchlecht.) Britton
Cassia Vogeliana Schlecht. Linnaea 12: 342. 1838.
Herbaceous, perennial, the stems and branches long-pilose. Stipules linear-filiform, persistent, 1-2 cm. long; leaflets 2-4 pairs, oblong to elliptic, 2.5 cm. long or less, obtuse or acutish, raucronate, glabrate, appressed-pubescent beneath; gland borne between two or more pairs of leaflets, about 4 mm. long, subulate-filiform; racemes borne in the upper leaf axils, few-flowered; pedicels pilose, about 1.5 cm. long, or shorter; .sepals pilose; petals 12-15 mm. long, nearly twice as long as the sepals; legume 1 -2 cm. long, about 6 mm. broad, pilose or becoming naked, blunt or apiculate.
Type locality: Regla, Hidalgo.
Distribution: Coahuila; San Luis Potosl; Hidalgo.

Earleocassia crotolarioides (Kunth) Britton
Cassia crotolarioides Kunth, Mim 132. 1819.
Chamaefistula crotalarioides G. Don, Gen. Hist. 2: 452. 1832.
Cassia apiculala Mart. & Gal. Bull. Acad. Brux. 10^: 304. 1843.
Suffrutescent, more or less branched, 2-4 dm. high, the branches, petioles and peduncles loosely or densely pubescent. Stipules setaceous, 4-7 mm. long; leaflets 3-5 pairs, oblong, obtuse or acute, 1.5-3 cm. long, glabrous or pubescent above, pubescent at least on the veins beneath; glands very slender, about 3 mm. long, borne between the 2 or 3 lower pairs of leaflets; peduncles 3-7-flowered; pedicels about I cm. long, or shorter; sepals obtuse, about 8 mm. long, pubescent; petals 10-15 mm. long; style short-subulate; legume short-oblong, swollen, 1.5-2.5 cm. long, 6-7 mm. wide, loosely pubescent, apiculate.
TypE locality: Near Guanajuato, Guanajuato. Distribution: San Luis Potosi to Puebla.