462 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
The plant of Jacquin does not seem to be the same as that described later 
by Vahl,’ on specimens from Santa Marta. In plate 27 of the Eclogae there is 
shown a leaf with three pinnae, each with one terminal pair of leaflets and with 
another of these near the base. The floral spikes seem to be faSciculate on a 
defoliate node. In Vahl’s description of the species no mention is made of these 
additional leaflets, and the plant is said to be unarmed. I had no access to 
Jacquin’s diagnosis and plate, but Willdenow’s description, based on Jacquin’s, 
applies very well to what is here considered as P. ligustrinum. 
10. Pithecollobium paniculatum Pittier, sp. nov. 
A bushy shrub about 4 meters high; bark of the branchlets brownish, glabrous. 
Leaves bipinnate, the basal stipules spinescent, subacicular, up to 10 mm. 
long; petioles canaliculate, rather stout, hairy, the primary ones 0.6 to 2.5 
cm. long, the apical gland small, substipitate, often obsolete; interpetiolar and 
terminal stipules very small, broad at base and acute at the apex; secondary 
petioles 0.5 to 1 cm. long, with or without an apical gland; leaflets unijugate, 
sessile, obovate or ovate, broadly rounded or emarginate at the apex, 2 to 4.5 
cm. long, 1 to 3 cm. broad, pilosulous above, more so on the costa, pilosulous 
or even hairy on the costa beneath, the venation prominent on both faces. 
Racemes forming axillary erect panicles up to about 7 em. long, the rachis 
densely villous-canescent ; bracts about 6 mm. long, formed by residual petioles, 
with the apical gland and stipule; racemes up to 4 cm. long, the peduncles 
about 2 cm. long, the flowers densely massed on the terminal part; bractlets 
subulate, hairy, 1 to 1.5 mm. long, caducous; calyx broad, woolly-hairy, 1.5 to 2 
mm, long; corolla broadly tubular-campanulate, about 4.5 mm. long, minutely 
silky-pubescent, the lobes lanceolate, acute, 1.5 to 2 mm. long; stamen tube broad, 
included; pistil 9 to 10 mm. long, glabrous, long-stipitate (the stipe 12 mm. 
long), 7 to 10-ovulate. 
Legume not seen. 
Type in the U. 8. National Herbarium, no. 674696, collected at San Gerénimo, 
Oaxaca, Mexico, December 9, 1906, by C. B. Doyle (no. 36). 
A very distinct type, characterized by the disposition of the racemes in 
axillary panicles, the small woolly flowers, the long-stipitate ovary, and the 
hairiness of the leaves. 
11. Pithecollobium pulchellum Pittier, sp. nov. 
Bushy, the branchlets thick, stiff, covered with a glabrous brownish bark. 
Leaves bipinnate, the basal stipules spinescent, slender, acute, up to 6 mm. 
long; petioles canaliculate, slender, pubescent or glabrescent, the primary ones 
0.4 to 1.4 cm. long, with a small, roundish, distinctly stipitate apical gland; 
interpetiolar and apical stipules small, spinulose, indurate; secondary petioles 
2 to 6 mm. long, the substipitate apical gland often obsolete; leaflets unijugate, 
subsessile, ovate, broadly rounded or subemarginate to subacute and mucronate 
at the apex, rounded on one side and cuneate on the other at the base, 1.3 to 8 
cm. long, 0.6 to 2.3 cm. broad, glabrous above except on the minutely pubescent 
petiolule, paler beneath and glabrous except for a white tuft of hairs (some- 
times obsolete) at the base of the inner half; venation prominulous on the 
lower face, almost obsolete on the upper face. 
Racemes very short, grouped in distinct axillary panicles, the rachis 1 to 2 
cm. long, very slender glabrous or villosulous, the heads rather short; bracts 
villosulous, formed by residual glandular apiculate petioles; bractlets subulate, 
hairy, nearly as long as the calyx or longer, caducous; flowers sessile; calyx 
1.5 mm. long, tubular, hairy; corolla 4.5 to 5 mm. long, minutely pubescent, 
"Eclog. Amer. 3: 34. pl. 27. 1807. 
