PITTIER—PLANTS FROM COLOMBIA AND CENTRAL AMERICA. 459 
4. Pithecollobium spinulosum Pittier, sp. nov. 
A tree, 7 to 10 meters high, the trunk up to 40 cm. in diameter; branchlets 
slender, flexible, with a grayish white, lenticellate bark, 
Leaves bipinnate, glabrous, the stipules spinuliform, very much reduced, 
acute; petioles canaliculate, the main one 0.6 to 2 cm. long, with a sessile cupu- 
lar apical gland; pinnae unijugate, the interpetiolar and interfoliar stipules 
conspicuous, subulate, spinulose, up to 3 mm. long, the secondary petioles 0.8 
to 2.5 cm. long, with an apical gland; leaflets unijugate, obliquely ovate-lanceo- 
late, obtuse at the apex, cuneate within and rounded without at the base, 2.5 
to 8.5 cm. long, 1 to 4 em. broad, light green above, paler beneath, the venation 
prominent on both faces. 
Inflorescences spicate, loosely paniculate at the ends of the branchlets, the 
rachis G6 to 10 ecm. long, slender, glabrous; bracts up to 5 mm. long, glabrous, 
with a large gland at the apex; bractlets scaly, canescent, very small; flowers 
sessile, slender, minutely pubescent, white, rather loose; calyx tubular, 2 to 
2.5mm. long; corolla tubular, 5 to 6 mm. long, slightly broader at the apex, the 
lobes about 1 mm. long; stamen tube short-exserted ; pistil glabrous, dimorphous, 
the short form about 2.5 mm. long, the long one up to 16 mm. long. 
Leguine dehiscent, subsessile, glabrous, arcuate or more or less circinnate, 
acute at the apex, the valves 10 to 13 mm. broad. 
Type in the U. 8S. National Herbarium, no. 920173, collected in the Lands of 
Loba, Department of Bolivar, Colombia, April or May, 1916, by H. M. Curran 
(no. 169). This collection represents the form with short style. 
Another collection was made at San Martin de Loba, same region, on the 
same date, Curran 48. This is the form with long style. 
This tree has the leaves of P. lanceolatum, but with very conspicuous spinu- 
lose petiolar stipules. The inflorescences are loose, with glabrous rachis and 
peculiarly shaped bractlets, which evidently represent the remnant of a petiole 
with its terminal gland. The flowers are like those of P. ligustrinum, except 
that the ovary is glabrous. 
5. Pithecollobium insigne M. Micheli, Bot. Gaz. 20: 285, 1895, 
A tree or shrub, the young branchlets puberulous. 
Leaves bipinnate, glabrous; petioles canaliculate, pilosulous, the main one 
5 to 6.5 em, long, with a small apical gland; pinnae unijugate, the interpetiolar 
and interfoliolar stipules slender, acute, and sometimes glandular, the second- 
ary petioles 2 to 4 cm. long; leaflets unijugate, subpetiolulate, large, subfalcate, 
obliquely ovate-lanceolate, 9 to 12.5 cm. long, 3.5 to 4.5 em. broad, acuminate 
or acute at the apex, glabrous, dark green above, paler beneath, the venation 
prominulous on both sides. 
Spikes axillary or paniculate at the ends of the branchlets, loose, not very 
thick, tomentose, the rachis 10 to 18 cm. long; bracts small, spinulose, caducous ; 
bractlets lanceolate-subulate, hairy, often almost as long as the calyx, subper- 
sistent; calyx sessile, densely grayish-velvety, 4 mm. long, 5. to 7-toothed; 
corolla 6 to 7 mm. long, densely grayish-pubescent ; stamen tube exserted ; pistil 
up to 22 mm. long, the ovary sessile, appressed-hairy. 
Type in the John Donnell Smith Herbarium, collected at San Pedro Sula, 
Department of Santa Barbara, Honduras, April, 1890, by C. Thieme (J. D. 
Smith, no. 5208). 
The above description is based partly upon specimens and partly upon 
Micheli’s description. 
The original specimens are, unfortunately, incomplete, but the species appears 
to be well characterized by its long-petiolate leaves and elongate spikes, and 
by its bracteoles. Micheli seems to have been uncertain as to its position in the 
