Senna tonduzii (Standl.) H. S. Irwin & Barneby

Peiranisia tonduzii (Standley) Britton & Rose
Cassia Tonduzii Standley, Contr. U. S. Nat. Herb. 20: 215. 1919.
A tree or shrub, the young branches slender, angled, brownish pubescent. Stipules subulate, deciduous; glands between most or all the pairs of leaflets long, slender, clavate, sometimes 3 mm. long; leaflets 4 or 5 pairs, lanceolate, acuminate, 2-9 cm. long, shining and glabrate above, strongly nerved and somewhat pubescent beneath; inflorescence paniculate; pedicels slender, often 2 cm. long; sepals orbicular, the outer one 5 mm. long, the inner 8-10 mm. long; petals very unequal, the larger 2.5 cm. long; perfect stamens 7, the larger ones with curved anthers I cm. long, each terminated by a slender beak 5-6 mm. long; ovary densely appressedpilose; legume 16-lS cm. long, 5-6 mm. wide, glabrate, long-stipitatc, its valves flat, thin.
Type locality: Along the Rio Tiliri, Costa Rica. Distribution: Chiapas and Costa Rica.

Peiranisia verbenensis Britton, sp. nov
A tree, 6-9 m. high, the slender twigs, the petioles and rachis sparingly pubescent. Leaflets 3 or 4 pairs, submembranous, ovate to elliptic, glabrous above, sparingly pubescent beneath, acute or obtuse, 1.5-5 cm. long; glands slender-clavate, about 3 mm. long, borne between one or more of the pairs of leaflets; peduncle axillary, very slender; immature legume linear, elongated, flat, sparingly pubescent, short-stipitate, IS cm. long, 8 mm. wide, its apex rounded, apiculate.
La Verbena, San Jose, Costa Rica, about 1200 m. altitude, January 29, 1924, Slandley 32215.