Senna fruticosa (Mill.) H. S. Irwin & Barneby

Chamaefistula sinaloana Britton & Rose, sp. nov
Branches slender, flexuous, glabrate, terete. Petiole 2-3 cm. long, sparingly pubescent; rachis sparingly pubescent, bearing a short-ovoid, rounded gland between the lower pair of leaflets; leaflets ovate to elliptic, loosely short-pubescent or glabrate above, rather copiously appressed-pubescent beneath, obtuse or rouiided at both ends, sometimes mucronulate, chartaceous, 4-8 cm, long; inflorescence axillary, perhaps also terminal, the axis pubescent; flowering pedicels pubescent; fruiting pedicels rather stout, glabrate, 2-2.5 cm. long; sepals oblong, apprcssed-pubescent, 5-7 mm. long; petals oblong, 9-10 mm. long; immature legume 7-12 cm. long, about 7 mm. wide, slender, sparingly pubescent, beaked.
Estero de Escuinapa, Sinaloa, 1926, /. G. Orlega 6172.

Chamaefistula ignota Britton & Rose, sp. nov
Branches somewhat zigzag with short intcrnodcs, and with dense, short velvety pubescence. Stipules caducous; petioles short, 1-2 cm, long, velvety, strongly grooved above; rachis bearing a large black gland between the lower pair of leaflets; leaflets oblong to elliptic, 2-8 cm. long, subchartaceous, obtuse or acutish, sparingly pubescent above, paler and softly pubescent beneath; inflorescence terminal, rather short and broad, densely paniculate, many-flowered; bracts small, caducous ; pedicels slender, 1-2 cm. long; sepals 5-7 ram. long, strongly red-nerved, slightly pubescent ; petals 8-9 mm. long; ovary pubescent; legume 6-15 cm. long, about 12 mm. in diameter, glabrous, shining, short-stipitate. Acapuico, Guerrero, 1895, E. Palmer 46 J.

Chamaefistula fruticosa (Mill.) Pittier, Trab. Mus. Com Venez. 3:152. 1928.
Cassia fruticosa Mill. Gard. Diet. ed. 8, no. 10. 1768.
A shrub, the branches glabrous, flexuous. Petioles and rachis puberulent; leaflets suborbicular or very broadly elhptic, 7-11 era. long, glabrous above, loosely short-pubescent beneath, the base rounded or obtuse, the apex abruptly acutish, the midvein nearly central; sepals densely strigose; inflorescence apparently paniculate and raany-flowered; legurae turgid, about 17 era. long and 2.5 cm. broad, glabrous, obtuse.
Type locality: Veracruz. Distribution: Veracruz; (?) Panama.

Chamaefistula berlandieri (Benth.) Britton & Rose
Cassia Berlandieri Benth. Trans. Linn. Soc. 27: 520. 1871.
Branches slender, flexuous, terete, loosely pubescent. Petioles 2-4 cm. long; rachis bearing a conic-cylindric gland between the lower pair of leaflets; leaflets submembranous, ovate to elliptic, 5-10 cm. long, obtuse or rounded, sparingly pubescent or glabrate above, softly pubescent beneath; flowers in short axillary racemes; pedicels very slender, 2-3.5 cm. long; bracts lanceolate, small, caducous; sepals puberulent, 5-8 mm. long; petals oblong, 8-15 mm. long; legume turgid, somewhat curved, 8-12 cm. long, about 14 mm. wide, shining.
Type locality: La Barbara between Tula and Tampico, Tamaulipas. Distribution: Tamaulipas and Veracruz.