PITTIER—-REVISION OF THE GENUS INGA 203 
Intiorescences solitary or geminate in the axils of the leaves, the peduncles 
2.5 to 7 cm. long, densely covered with long, golden yellow hairs, the flower heads 
short and broad; flowers sessile; bractlets ovate to lanceolate, acute, 6 to 10 mm. 
long, hairy without, glabrous within, striate, persistent ; calyx broad, 13.7 to 16.3 
(14.7) mm. long, striate, the base sparsely covered with long hairs, these denser 
on the linear or subulate teeth, these 4.5 to 7 mm. long; corolla tubular, slightly 
broadened at the apex, 18 to 22.5 (20) mm. long, villous, the lobes lanceolate, 
reflexed, 3 to 4.5 mm. long; staminal tube included, the filaments numerous, 
white or purplish; style truncate. 
Legume about 22 cm. long and 4 cm, broad, flat, long-stipitate, rounded and 
cuspidate at the apex, densely covered with long, stiff, golden yellow hairs, the 
seeds (up to 20) immersed in a white, sweet pulp. 
Type in the Herbarium of the New York Botanical Garden, collected at Apolo, 
Bolivia, at an altitude of 1,560 meters, flowers and fruits, June 28, 1902, by R. 8. 
Williams (no. 1640). 
Boxrvia: (Besides the type) Rio Juntas in coca plantation, alt. 800 meters, 
flowers and fruits, April 13 to 21, 1892, Ofte Kuntze. Polo-Polo, near 
Coroico, Yungas del Norte, alt. 1,100 meters, flowers and fruits, October 
and November, 1912, Buchtien, 
Peru: Lucumayo Valley, alt. 1,800 to 3,600 meters, flowers and young fruits, 
June 20, 1915, Cook & Gilbert 1390. 
This species, said to be cultivated in Bolivia under the name of “ pacay ” (Wil- 
liams in sched.), has been and is easily confused with Inga hirsutissima Rusby, 
of which it may be only a subspecies. The flowers, however, are much larger, 
the calyx of the latter having an average length of 6.9 mm., which is less than 
half that of the same part in J. chrysotricha; and besides this, the calyx teeth 
of I. hirsutissima are broad and not over 3 mm. long, while in J. chrysotricha 
they are linear or subulate, ranging from 4.5 to 7 mm. in length. 
In the corolla, which is not over 16 mm. long in Rusby’s species, we note also 
appreciable differences in the shape, that of the latter species being a near 
approach to true campanulate, while in the former it is simply broadened a little 
at the apex. 
A feature not noted heretofore in J. hirsutissima is the presence of paired 
glands between the lower leaflets. In the several specimens which I have ex- 
amined they were found only at the insertion of the first pair, and were often 
confluent, so as to form a single, transversely flattened gland. In JI. chryso- 
tricha they appear between the leaflets of the two basal pairs and seem to be 
always distinct. 
With reference to I. hirsutissima Rusby, it is to be observed that the descrip- 
tion is in some respects inaccurate. We note for instance that the hairs are not 
ferruginous but fulvous, the stipules not “ cartilaginous ” but at most coriaceous, 
the leaves not quite sessile, the rachis not 5 cm. but 5 to 10.5 cm. long, the 
breadth of the wings ranging from 5 to 12 mm. and not from 5 to 7, the flower- 
ing peduncles from 4.5 to 7.5 cm. and not the fixed length of 3 cm., etc. The 
characters of the corolla have been omitted and it would appear from the 
description that each flower has several styles. A better description might 
certainly have been drawn from any of the 5 specimens of the type number 
which I have examined. 
Inga cookii Pittier, sp. nov. 
A shrub or a small tree; branchlets, rachis of the leaves, and peduncles 
densely covered with long, brown, setulose hairs. 
Rachis of the leaves winged (the wings sparsely hirsute, ciliate, about 6 
mm, broad, extending to the base), 5 to 7.5 cm. long, the petiolar part 0.5 to 1 
