PITTIER—-REVISION OF THE GENUS INGA. 185 
tubular, 8.5 to 9.8 (9) mm. long, silky-pubescent, the lobes 0.5 to 1 mm. long; 
staminal tube included; stamens short, but exceeding the truncate style. 
Legume flat, thin, glabrous, about 9 cm. long and 2.3 cm. broad, the prominent, 
thin margins bordering the valves. 
Type in the U. 8. National Herbarium, no. 32671, collected at Mapir{, Bolivia, 
at an altitude of about 800 meters, flowers and fruits, May, 1886, by H. H. 
Rusby (no. 1003). 
This species is distinguished from its close relatives by the glabrous leaves, 
4-jugate leaflets, and large paniculate inflorescences with numerous short and 
broad flower heads. The legume described seems to be immature. Inga myrio- 
cephala may be closely related to I. acrocephala Steud., from Surinam, but 
differs in the short petiolules, in having the costa and veins slightly prominent 
on both faces of the leaflets, and in the larger flowers. . 
Inga pinetorum Pittier, sp. nov. PLATE 90. 
A tree; branchlets densely ferruginous-hairy, lenticellose. 
Rachis of the leaves terete, densely ferruginous-pubescent, 2.5 to 3.5 cm. long, 
the petiolar part 0.5 to 1.2 em. long; stipules ovate-acuminate, 3 to 4 mm. long, 
hairy, persistent; leaflets 2-jugate, petiolulate; glands very small, substip- 
itate, urceolate, pertuse, smooth outside; petiolules densely ferruginous- 
hairy, about 38 mm. long; leaflet blades suboblique, obovate, cuneate 
at the base, subobtuse and mucronate or sometimes acuminate at the apex, 
coriaceous, the upper face darkish, dull (in sicco), and sparsely hairy except 
on the brownish-pubescent costa and the impressed veins, light brown and 
pilosulous beneath, with the costa, veins, and venules prominent, the blades of 
the lower pair 4 to 6.5 cm. long, 2 to 8.5 em. broad, those of the upper pair 8 to 
12 cm. long, 3 to 5 cm. broad. 
Inflorescences axillary; floral spikes geminate, 7 to 9 cm. long; peduncles 
5 to 6.5 em. long, terete, ferruginous-hairy; rachis hairy, 1 to 2 cm. long; 
flowers sessile; calyx tubular, stipitate, 6.5 to 7.2 (6.9) mm. long, sparsely 
hairy, the teeth rather narrow and acute; corolla tubular-funnelform, silky- 
villous, 11.4 to 11.7 (11.6) mm. long, the lobes nearly 3 mm. long, narrow, 
acute; staminal tube slightly exserted; pistil about 4 cm. long; ovary long- 
stipitate, fusiform, glabrous; style subtruncate. 
Legume not known. 
Type in the Gray Herbarium, collected at Pineridge, near Manatee Lagoon, 
British Honduras, flowers, February 19, 1906, by M. C. Peck (no, 348). 
Though identified as Inga leptopoda, this is a species quite distinct on account 
of its peculiar hairiness, its long flowers, and the fusiform, stipitate ovary. 
EXPLANATION OF PLATE 90.—From a photograph of the type specimen of Inga pine- 
torum. Natural size. 
Inga popayanensis Pittier, sp. nov. PLATE 91. 
Branchlets terete or subangulate, the younger parts glabrous or glabrescent, 
3-angulate, 
Rachis of the leaves terete or submarginate, glabrous (pubescent as is the 
whole leaf at an early stage), 3 to 6.5 cm. long, the petiolar part 1.5 to 2 cm.; 
stipules linear-lanceolate, subulate, glabrous, 6 to 8 mm. long, caducous; leaflets 
2 or 3-jugate, oblique, petiolulate, coriaceous ; glands sessile, globose or urceo- 
late, pertuse, sometimes obsolete; petiolules thick, 3 to 4 mm. long, glabrous; 
leaflet blades lanceolate, cuneate at the base, long-acuminate at the apex, dark 
green, glabrous or glabrescent, and sublustrous above, dull, rusty-colored, and 
sparsely pubescent beneath, the costa and veins glabrous and slightly promi- 
nent on the upper face, pubescent and very prominent beneath, the blades of 
