Zapoteca formosa subsp. rosei (Wiggins) H. M. Hern.

Anneslia gracilis (Mart. & Gal.) Britton & Rose
Acacia gracilis Mart. & Gal. Bull. Acad. Brux. 10=: 311. 1843.
Glabrous throughout, the branches slender, elongated. Stipules oblong-lanceolate, obtuse or acutish, 3-4 mm. long; petioles slender, 1.5-3.5 cm. long; pinnae 1 or 2 pairs, the petiolules 4-7 mm. long; leaflets 5-7 pairs, oblong to narrowly obovate, thin, 0.5-2 cm. long, the apex obtuse or mucronate, the base obtuse, more or less subtruncate; peduncles axillary, slender, 2.5-5 cm. long, solitary or sometimes 2; heads several-flowered; calyx about 1 mm. long; corolla about twice as long as the calyx; filaments about 10 ram. long; legume 5-6 cm. long,
5 mm. wide, glabrous, obtuse, the base short-attenuate.
Type locality: Granitic rocks on the coast of Oaxaca. Distribution: Western Mexico from Sonora to Oaxaca.

Anneslia interior Britton & Rose, sp. nov
Herbaceous, glabrous throughout, the twigs elongated, terete. Leaves large; stipules ovate, 8-9 mm. long, striate; pinnae 2 or 3 pairs; leaflets 15-18 pairs, oblong, membranous, 12-20 mm. long, 4-5 mm. wide, obtuse; inflorescence a.xillary, somewhat paniculate, 4-5 cm. long; peduncles 1-4 cm. long; calyx about 1 mm. long; corolla about 3 mm. long; filaments 2 cm. long, purple.
Mountains of southern Durango, August 15, 1897, Rose 2317.

Anneslia socorrensis (I. M. Johnston) Britton & Rose
Calliandra socorrensis I. M. Johnston, Contr. Gray Herb. 70: 71. 1924.
A low, glabrous, much branched shrub, the twigs short. Stipules oblong, lanceolate, 2-3 mm. long, acute, persistent; pinnae 2 pairs; leaflets 5-7 pairs, oblong, 4-12 mm. long, dull, chartaceous, obtuse, faintly veined, strongly oblique at base; peduncles axillary, 2-3 cm. long; legume 5-6 cm. long, about 9 mm. wide, glabrous, about 5-seeded.
Type locality: Socorro Island, off the coast of Lower California.
Distribution: Known definitely only from the type locality; perhaps also occurring on the mainland of Lower California.

Anneslia delicata Britton & Rose, sp. nov
Branches very slender, glabrous. Stipules lanceolate, acute, about 3 mm. long; petioles very slender, glabrous, 1.5-2 cm. long; pinnae 2 pairs; rachillas very sparingly pilose ; leaflets 5 or 6 pairs, oblong or the upper pair oblong-obovate, 6-12 mm. long, glabrous or sparingly ciliolate, thin, acute or mucronate; upper leaves reduced to stipules only; peduncles nearly filiform, glabrous, 2-4 cm. long; heads few-flowered; calyx about 1 mm. long; corolla about twice as long as the calyx; stamens about 1 cm. long; legume about 6 cm. long, 4-5 mm. wide, glabrous.
San Jose del Cabo, Lower California, September, 1890, T. S. Brandegee.