Leucaena lanceolata var. lanceolata

Leucaena purpusii Britton & Rose, sp. nov
A small tree 4-5 m. high, glabrous throughout. Glands slightly elevated, borne near the base of the petiole and just below the upper pair of leaflets; petioles 2-3 cm. long; pinnae 2 pairs; leaflets 4 or 5 pairs, lanceolate to ovate, acute, 3.5 cm. long, pale, few-veined; flowers white, glabrous; legume linear, 10-18 cm. long, 12-16 mm. broad, lounded at apex, apiculate, glabrous, shining, tapering at base into a slender stipe 1.5-2 cm. long.
Rim of the barranca Rio Remudadero, Veracruz, January, 1926 Piirpus 10607.

Leucaena pubescens Britton & Rose, sp. nov
Twigs, petioles and rachis pubescent. Petiole 1.5-2.5 cm. long, bearing a gland just below the lower pair of piimae; pinnae 2 or 3 pairs; leaflets 3 or 4 pairs, ovate to orbicular, somewhat oblique, apiculate, pale and pubescent beneath, glabrate above; rachilla bearing a small orbicular gland just below the upper pair of leaflets; fruiting peduncle 2 cm. long; legume 10-20 cm. long, 1 .7 cm. broad, velutinous, the apex subtrtmcate, with a minute excentric ' tip, tapering at base into a stipe 8-20 mm. long.
Mazatlan, Sinaloa, 1925, Ortega 5988.

Leucaena palmeri Britton & Rose, sp. nov
Glabrous throughout. Leaves 2-2.5 dm. long; petioles 3-4 cm. long, bearing an inconspicuous, low, oblong gland; pinnae 4 or 5 pairs; leaflets 3-6 pairs, oblong-lanceolate, acute, 2-3 cm. long, faintly reticulateveined ; rachilla bearing a minute orbicular gland below the upper pair of leaflets, and a subulate terminal appendage 2-3 mm. long; peduncles 3-4 cm. long; legume linear, 13-18 cm. long, about 14 mm. wide, obtuse, glabrous.
Near Alamos, Sonora, September 16-30, 1890, Palmer 71S.

Leucaena sonorensis Britton & Rose, sp. nov
A shrub or small tree about 4 m. high. Leaves large, 3-4 dm. long; petioles, rachis and rachilla pubescent; petiolar gland not prominent; rachilla bearing a small low-conic gland below the upper pair of leaflets; rachis bearing a rather large conic gland near its upper end; pinnae about 5 pairs, long-stalked; leaflets about 5 pairs, lanceolate or the upper oblonglanceolate, acute or short-acuminate, 3.5-5 cm. long, pubescent on both sides; legume linear, velutinous, 15-17 cm. long, 1.6-1.8 cm. wide, its tip triangular, its base cimeate, its stipe about 1 cm. long.
Sierra de Alamos, Sonora, March 14, 1910, Rose, Standley & Russell 12821.

Leucaena cruziana Britton & Rose, sp. nov
Old branches gray, glabrous. Pinnae several pairs; leaflets 2 or 3 pairs, 2-4 cm. long, ovate to lanceolate, somewhat oblique, dark green and slightly pubescent above, appressedpubescent beneath; gland oblong depressed, borne at the lower pair of pinnae; legume 12-16 cm. long, 1.6-1.8 cm. wide, densely velutinous, the tip triangular, acute, the base cuneate, the stipe 1-1.5 cm. long.
Barranca de Panoaya, Veracruz, December, 1919, Pur pus S3S7.

Leucaena microcarpa Rose, Contr. U. S. Nat. Herb 5: 141. 1897.
A small tree, about 6 m. high, the twigs, petioles and leaf-rachis glabrous. Pinnae 2 or 3 pairs, slender-stalked; glands small, orbicular, slightly elevated, borne just below the lower pair of pinnae and sometimes between the upper pair; leaflets 2-5 pairs, elliptic to obovate or suborbicular, 1.5-4 cm. long, obtuse, glabrous, or sparingly pubescent on the veins beneath, reticulate-veined; legume linear, 7-13 cm. long, 10-14 mm. wide, glabrous, pointed, the slender stipe 1-1.8 cm. long.
Type locality: Miraflores. Lower California. Distribution: Sinaloa; Lower California.

Leucaena sinaloensis Britton & Rose, sp. nov
A low shrub, the twigs terete, glabrous. Stipules minute, ovate-acuminate, often caducous; pinnae 2-4 pairs; leaflets 2-5 pairs, broadly ovate or orbicular to oblong, mucronate, 1-3 cm. long, fewveined, glabrous; peduncles axillary, solitary or in clusters of 3 or 4, 2-3 cm. long, glabrous; involucre small, sometimes below the top of the peduncle; petals glabrous; anthers hairy; legume 9-16 cm. long, about 1.7 cm. wide, cuneate and short-stipitate at base, rounded at apex with a short mucro, glabrous.
Sinaloa. Type from vicinity of Palmar, .April 15, 1910, Rose, Standley cf Russell 14650.

Leucaena brandegeei Britton & Rose, sp. nov
Twigs, petioles and rachis densely pilose. Leaves large; pinnae 6 pairs; leaflets 3-6 pairs, ovate to lanceolate, 2-4 cm. long, acute or acutish, broadly cuneate at base, appressed-pubescent on both sides, paler beneath than above; rachilla bearing a small, elevated gland below the upper pair of leaflets; fruiting peduncle 2.5 cm. long; legume 14—20 cm. long, velutinous, 1.6-1.8 cm. broad, the apex rounded, with a minute tip, long-cuneate at base and tapering into ^ slender stipe 1-2 cm. long.
La Mesa, Cape region of Lower California, 1893, T. S. Braiidegee.