PITTIER—-PLANTS FROM COLOMBIA AND CENTRAL AMERICA. 457 
Ovary distinctly stipitate; spikes in axillary panicles; stamen tube almost 
always included. 
Stipe of the ovary not over 1 mm. long. Ovary glabrous. 
Petiolar glands sessile or- substipitate; inflorescences stout, grayish- 
hairy; leaflets pilosulous all over_____------- 10. P. paniculatum. 
Petiolar glands distinctly stipitate; inflorescences slender, glabrous or 
villosulous; leaflets glabrous except at the barbate base. 
11. P. pulchellum. 
Stipe of the ovary 2 mm. long or over. 
Leaflets oblong or obovate, up to 5 em. long, usually narrow and obtuse 
at the apex; glands sessile; ovary hairy___----- 12. P. oblongum. 
Leaflets not over 2 cm. long, broadly ovate, usually emarginate at the 
apex; glands stipitate; ovary glabrous_____-- 13. P. subglobosum. 
DESCRIPTION OF SPECIES. 
1. Pithecollobium pachypus Pittier, sp, nov. 
A small tree, the bark brownish gray, minutely lenticellate on the younger 
branchlets, these glabrous or glabrescent and stiff. 
Leaves bipinnate, coriaceous, the basal stipules spinescent, straight, slen- 
der, acute, up to 5 mm. long; petioles canaliculate, more or less hairy in the 
deep recesses, the main petiole 0.5 to 1 cm. long, with a discoid sessile apical 
gland; pinnae unijugate, the interpetiolar stipules triangular-acute, very 
short, hairy, caducous, the secondary petioles 4 to 6 mm. long, the apical 
gland small and often obsolete; leaflets unijugate, sessile, oblique-ovate, obtuse 
and often emarginate at the apex, barbate at the base on the inner half, 2.5 
to 5 em. long, 1.5 to 3 cm. broad, the venation very prominent on the upper 
side, less so on the lower side. 
Racemes axillary, subpaniculate at the ends of the branchlets, the rachis 4.5 
to 7 em. long, grayish-hairy; bracts up to 6 mm. long, hairy, formed by a 
residual petiole with the apical gland and ending with the reduced inter- 
petiolar stipule; bractlets linear-subulate, very small, hairy; flowers white, 
densely grayish-hairy, 15 mm. long; calyx tubular, 3 mm. long; corolla 5 to 6 
mm, long; stamen tube exserted; pistil 15 mm. long, glabrous. 
Legume dehiscent, 6 to 8 cm. long, about 1.5 cm. in diameter, 2 to 4-seeded, 
the valves 2 cm. broad; seeds ovoid-depressed, up to 2 cm. broad, brown and 
lustrous. 
Type in the U. S. National Herbarium, no 399510, collected in the vicinity 
of San Salvador, El Salvador, in 1905, by Carlos Renson (no. 218). 
Clearly related to P. ligustrinum (Jacq.) Klotzsch, but differing by its short 
petioles, the hairiness of the calyx and corolla, and, above all, by the short, 
uncommonly thick pods. It is known locally under the name of “ abracade.” 
2. Pithecollobium hymenaeaefolium (Humb. & Bonpl.) Benth. Lond. Journ, 
Bot. 3: 198. 1844, 
Inga hymenacaefolia Humb. & Bonpl.; Willd. Sp. Pl. 4: 1008. 1806. 
Mimosa hymeneaefolia Poir. in Lam, Encycl. Suppl. 1: 38, 1810, 
Pithecollobium panamense Walp. & Duchass. Linnaea 23: 746. 1850. 
A shrub or a small tree, up to 4 meters high, the bark of the branchlets 
grayish, smooth, glabrous. 
Leaves bipinnate, glabrous, the stipules spinescent, strong, more or less 
arcuate, up to about 1 cm. long; petioles stout, canaliculate, the main one 1 
to 3.5 em. long, with a large sessile cupulate gland at the apex; pinnae uni- 
jugate, the interpetiolar and interfoliar stipules small, apiculate, puberulous, 
