Pithecellobium oblongum Benth.

Pithecellobium pulchellum Pittier, Contr. U. S. Nat. Herb 20: 462. 1922.
A shrub, with glabrous twigs. Stipular spines stiff, 6-15 mm. long; petioles about 1.5 cm. long or shorter, the apical gland with a short stout stipe; pinnae 1 pair; leaflets 1 pair, ovate to obovate, chartaceous, 1-3 cm. long, glabrous or nearly so, rounded or acutish at the apex; spikes 1-2 cm. long, borne in axillary panicles, short-peduncled ; bractlets subulate, caducous, 1-2 mm. long; flowers finely pubescent; calyx 1.5 mm. long; corolla about 5 mm. long; stamen-tube not longer than the corolla; stipe of the ovary 1 mm. long; legume glabrous, 1 cm. broad.
Type loc.u-ity: Culiacan, Sinaloa. Distribution: Sinaloa.

Pithecellobium oblongum Benth. Lond. Journ. Bot. 3: 198. 1844. Feuilleea ohlonga Kuntze, Rev. Gen. PI. 188. 1891.
A shrub or a small tree up to about 6 m. high, the slender twigs glabrous, the stipular spines 5-10 mm. long. Petiole 1-3 cm. long, bearing a cupulate sessile gland at the summit; pinnae 1 pair; leaflets 1 pair, obliquely oval to oblong-ovate, 1.5-4 cm. long, glabrous, reticulate-veined; spikes racemose or panicled, oblong, few-several-flowered, 0.5-2 cm. long, on slender, sparingly pubescent peduncles 0.5-2 cm. long; calyx about 1 mm. long, puberulent; corolla 4-5 mm. long; stamen-tube included; legume 6-8 cm. long, 8-10 mm. wide, glabrous.
Type locality: Panama. Distribution: Panama.

Pithecellobium paniculatum Pittier, Contr. U. S. Nat. Herb 20: 462. 1922.
A shrub about 4 m. high, the twigs glabrous. Stipular spines acicular, 10 mm. long or shorter; petioles 0.5-2.5 cm. long, pubescent, the apical gland small or obsolete; pinnae 1 pa'u"; leaflets 1 pair, obovate or elliptic-ovate, 2-4.5 cm. long, pilose above and on the veins beneath; spikes panicled, dense, 2-4 cm. long, the peduncles and rachis vUlous; bractlets subulate, 1.5 mm. long, caducous; flowers villous-pubescent; calyx 1.5-2 mm. long; corolla 4-5 mm. long; stamen-tube not longer than the corolla; ovary long-stipitate.
Type locality: San Geronimo, Oaxaca. Distribution; Known only from the type locality.