Zygia conzattii (Standl.) Britton & Rose

Zygia conzattii (Standley) Britton & Rose
Calliandra Conzatlii Standley, Contr. U. S. Nat. Herb. 20: 188. 1919.
A shrub, the young twigs brownish-pubescent, in age glabrate. Stipules minute, ovate; petioles wanting or very short, sometimes 10 mm. long, usually bearing a cup-shaped gland at the top; pinnae 1 pair; leaflets 2-4 pairs with an odd basal one, the upper ones opposite or nearly so, ovate to oblong, 2-9 cm. long, obtuse or sometimes acuminate, glabrous; rachis of pinnae angled, hairy, without glands; flowers in small sessile heads; calyx 2 mm. long, glabrous; corolla 6 mm. long, glabrous, yellowish; staminal tube exserted beyond the corolla; legume 8-12 cm. long, 12-15 mm. broad, more or less curved, sometimes circular, obtuse, puberulent.
Type locality: Near the Rio de Piles, Oaxaca. Distribution: Oaxaca.

Zygia recordii Britton & Rose; Standley, Tropical Woods 7: 6. 1926
A shrub or medium-sized tree, the twigs glabrous. Leaves sessile or nearly so; pinnae 1 pair with a gland between them and between the upper pair of leaflets; rachis of pinnae pubescent; leaflets 2, 3 or 4, obliquely oblong, 4-9 cm. long, acute, obtuse, retuse or shortacuminate, glabrous, strongly veined on both sides; flowers in short sessile or short-peduncled spikes; calyx 0.5 mm. long; corolla slender, 5 mm. long, glabrous; stamens 12 mm. long, the tube long-exserted ; legume 5-10 cm. long, 1 cm. broad, strongly curved, glabrous; seeds flattened, orbicular, 1 cm. in diameter.
Type locality: Along the bank of New River, near Guinea Grass, British Honduras. Distribution: British Honduras and eastern Guatemala.

Zygia scopulina (Brand.) Britton & Rose
Calliandra scopulina Brand. Univ. Calif. Pub. Bot. 10: 183. 1922.
A shrub, the branches glabrous. Petiole very short, 1 cm. or less long, bearing a large flat gland at the top; pinnae 1 pair; rachis hairy in lines; leaflets 2 or 3 pairs, ovate to oblong, 6 cm. long or less, obtuse, glabrous, strongly reticulated on both sides, shining; flowers in small axillary heads on peduncles 3-5 mm. long, puberulent; corolla glabrous, 6 mm. long.
Type locality: Cameron, Veracruz. Distribution: Veracruz.