Senna polyantha (Collad.) H. S. Irwin & Barneby

Pterocassia rubricaulis Rose, sp. nov
A branched shrub, glabrous throughout, the branches reddish, somewhat grooved; leaflets 12-15 pairs, oblong, 12-20 mm. long, 5-6 mm. wide, acute or acutish, mucronate ; fruiting pedicels 2.5-3.5 cm. long; legume 9-11 cm. long, about 25 mm. wide, rounded at apex, apiculate, its wings about 2 mm. wide.
Vicinity of San Luis Tuhitlanapu, southern Puebla, July 22, 190S, C. A. Purpus 2657.

Pterocassia polyantha (Mog. & Sesse) Britton & Rose
Cassia polyantha Mog. & Sesse; CoUad. Hist. Cass. 1 12. 1816. Cassia Browniana Kunth, Mim. 135. 1819.
A large shrub or small tree, up to 4.5 m. high, the branches and inflorescence glabrous or pubescent. Leaflets 8-15 pairs, oblong, rounded or obtuse, 12-18 mm. long, 4-8 mm. wide, mucronate, glabrous, or pubescent; racemes axillary and terminal, few-flowered; bracts lanceolate, acute, about 3 mm. long;pedicels slender, 1-2 cm. long; larger sepals 5-6 mm. long; petals about twice as long as the larger sepals; legume 10-12 cm. long, 16-18 mm. wide, apiculate or short-tipped, its wings about 2 mm. wide.
Type locality; Mexico.
Distribution: Guanajuato and Michoacdn to Oaxaca.

Pterocassia goldmanii (Rose) Britton & Ro.se
Cassia Goldmanii Rose, Contr. U. S. Nat. Herb. 10; 98. 1906.
A shrub or small tree, 4-6 m. high, glabrous or nearly so. Leaflets 5-12 pairs, narrowly oblong, 12-16 mm. long, about 3 mm. wide, rounded and muocronulate at apex; fruiting pedicels about 2 cm. long; legume 8-10 cm. long, about 2 cm. wide, glaucous, short-stipitate, its wings 2-3 mm. wide.
Type locality: Southwest of El Potrero, Lower California. Distribution; Lower California. •