PITTIER—REVISION OF THE GENUS INGA. 191 
first ferruginous-pubescent, becoming glabrous and lustrous, the margin 7 mm. 
broad, slightly elevated around the valves, more or less ferruginous-pubescent ; 
seeds 5 to 10. 
Type in the U. S. National Herbarium, no. 678053, collected at Bismarck, 
above Penonomé, Province of Coclé, Panama, flowers and fruits, March 6, 
1908, by R. 8. Williams (no. 316). 
In its dimensions the fruit of this species recalls that of Inga densiflora 
Benth., illustrated in plate 97, but this seems to be the only common character 
between the two types, the former apparently having no close ally among the 
known species of the series Pilosiusculae. 
EXxPLANATON OF PLATES 96, 97.—PIl. 96, fruit of the type specimen of ZJnga monticola. 
Pl, 97, specimen of the type collection of Jnga densiflora in the Gray Herbarium, collected 
near Tarapoto, eastern Peru, 1855-56, by R. Spruce (no, 4504). Both natural size. 
Inga organensis Pittier, sp. nov. 
Young branchlets densely ferruginous-hairy. 
Rachis of the leaves winged, densely ferruginous-hairy, 10 to 12 ecm, long, 
the wings more or less attenuate toward the base, 5 to 12 mm. long, the petiolar 
part (also winged) 2 to 2.5 em. long; stipules unknown; leaflets 4-jugate, sub- 
coriaceous, petiolulate; glands small, suburceolate; petiolules densely fer- 
ruginous-pubescent, about 8 mm. long; leaflet blades ovate to elliptic-oblong, 
slightly attenuate and obtuse at the base, short-acuminate and mucronulate 
at the tip, dull above, paler and reticulate beneath, the costa and veins fer- 
ruginous-pubescent on both sides and prominent beneath, the blades of the basal 
pair 3 to 5 cm. long, 1.2 to 2 em. broad, those of the terminal pair 11 to 12 cm. 
long, 4 to 4.5 em. broad. 
Floral spikes 2 or 8-clustered in the upper axils, the peduncles densely fer- 
ruginous-hairy, 2 to 2.5 cm. long, the flower heads ovoid; flowers sessile; bract- 
lets linear, pubescent, 6 mm, long or less, caducous; calyx 1.5 to 2.1 (1.8) mm, 
long, broad, densely fulvous-pubescent, the teeth short, acute, parted by 
rounded sinuses; corolla 4.7 to 5 (4.9) mm. long, white, broadened above the 
calyx, densely silky-pubescent, the lobes triangular, subacute; staminal tube 
exserted ; style much longer than the stamens. 
Legume not known, 
Type in the Gray Herbarium, collected in the Organ Mountains, Brazil; 
further data not given. 
In this species, which is certainly not included in Bentham’s last revision and 
seems not to have been described since, the flowers are even smaller than in 
Inga chartacea. It possibly belongs near I. densiflora. 
Inga sordida Pittier, sp. nov. 
A tree; branchlets terete, the younger parts densely ferruginous-tomentellous. 
Rachis of the leaves ferruginous-tomentellous, winged, 8.5 to 17 cm. long, 
the petiolar part 2 to 2.5 em. long, winged, the wings attenuate toward the base 
and the apex, 8 to 15 mm. broad; stipules unknown; leaflets 3 or 4-jugate, 
coriaceous, subsessile; glands rather large, subsessile, crateriform; leaflet 
blades ovate or oblong, broadly rounded and emarginate at the base, acuminate 
at the apex, glabrous, sordid brown and lustrous above, softly pubescent and 
reticulate beneath, the costa pubescent and prominent and the veins impressed 
on the upper face, the costa and veins densely hairy and strongly prominent 
on the lower face; blades of the basal pair 5 to 9 cm. long, 1.5 to 3.5 cm. broad, 
those of the terminal pair 16 to 18 cm. long, 6.5 to 7 em. broad. 
Floral spikes paniculate at the ends of the branchlets or on short, axillary, 
defoliate branchlets, the peduncles densely ferruginous-tomentellous, 2 to 2.5 
em. long, the flower heads elongate and very dense; flowers sessile; bractlets 
