176 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Type in the U. 8S. National Herbarium, no. 715488, collected in woods around 
San Felix, eastern Chiriquf, Panama, flowers, December 23, 1911, by H. Pit- 
tier (no. 5270). 
Costa Rica: Santo Domingo de Osa, in woods, fruits, March, 1896, Tonduz 
(Inst. Fis. Geogr. Costa Rica, no. 10032). 
BritisH Honpuras: Punta Sierra, on the banks of a highland creek, flowers, 
January 16, 1903, Percy Wilson 41, 
This is the first species of the section Leptinga reported from Central Amer- 
ica. It is near Inga quaternata Poepp. & Endl. because of its villous-tomentose 
flowers, but differs in its short umbellules, much larger flowers, and glabrous 
or subglabrous leaves. It is named for Rear Admirai H. H. Rousseau, C. E., 
one of the Panama Canal builders, in acknowledgement of. his never-failing 
interest in the progress of the botanical survey of Panama. 
EXPLANATION OF Pats 82.—Fruit of Inga rowssoviana, collected in Costa Rica by 
Tonduz, the specimen cited above. Natural size. 
Inga saffordiana Pittier, sp. nov. 
A small, slender tree; bark grayish, smooth ; young branchlets densely covered 
with long, brown hairs. 
Rachis of the leaves terete, villous-hairy like the branchlets, 5 to 12 em. 
long; stipules subulate, villous, persistent, 5 to 12 mm. long; leaflets 4 or 
5-jugate, petiolulate, coriaceous; glands very small, long-stipitate (the stipe 
about 3.5 mm, long), concave; petiolules 2 to 3 mm. long, villous; leaflet blades 
oblique or suboblique, ovate to elliptic-lanceolate, rounded at the base, acutely 
acuminate at the apex, glabrous above, the costa and veins slightly prominent, 
beneath reticulate and glabrous except on the prominent costa and veins, 
sparsely long-ciliate on the margin; blades of the basal pair 3.5 to 5.5 em. long, 
2 to 2.5 cm. broad, those of the terminal pair 13 to 14 cm. long, 8 to 4 em. 
broad. 
Inflorescences axillary or issuing from the old wood, single, the peduncles 
villous, 4 to 13 em. long; pedicels 1.5 to 2 em. long; bractlets subulate, villous, 
5 to 10 mm. long, persistent; flowers not known. 
Legume (immature) thickly covered with a profusion of long brownish 
hairs, cuneate at the base, rounded, subemarginate, and mucronate at the 
apex, 15 to 82 em. long, 2.5 to 3 em. broad; seeds up to 17 in each pod. 
Type in the U. 8S. National Herbarium, no, 715957, collected in the forests 
of Cerro de Garagara, in the Sambt Valley, southern Darién, Panama, at an 
altitude of about 500 meters, young pods, February 8, 1912, by H. Pittier (no. 
5676). 
Notwithstanding the incompleteness of: the specimens, this species is so dis- 
tinctly sui generis, that I do not hesitate to describe it as new. The known 
characters indicate clearly that it should take its place in the section Leptinga. 
The tree, growing in the high forest. has long, slender, flexible stems and a 
very sparse, short ramification. Most of the inflorescences seem to issue from 
the old wood of the trunk. 
Named in honor of Mr. William EF. Safford, Economic Botanist of the Bureau 
of Plant Industry, U. 8. Department of Agriculture. 
Inga williamsii Pittier, sp. nov. 
A small tree about 7 meters high, the trunk 13 em. in diameter (Williams) ; 
branchlets terete, glabrous, the younger parts densely ferruginous-tomentose, 
Rachis of the leaves terete, grayish or brownish-tomentose, 5 to 7.5 em. 
long, the petiolar part 1.5 to 2.5 em. long; stipules lanceolate, acute, 3 to 15 
mm. long, caducous; leaflets 8 or 4-jugate, petiolulate; glands small, sessile, 
