PITTIER—-REVISION OF THE GENUS INGA. 179 
the flowers are larger, the leaflets thinner and longer acuminate, and the glands 
very distinctly stipitate. In both species the fruits are prized for the thickness 
and flavor of the aril-like pulp surreunding the seeds. 
Inga rusbyi Pittier, sp. nov. 
Branchlets glabrous, subangulate, striate. 
Leaves glabrous, the rachis striate and obscurely canaliculate, thick, 10 to 
24 em, long, the petiolar part 2.5 to 3 em. long; stipules linear, obtuse, glabrous, 
subpersistent, 4 to 10 mm. long; leaflets 4 or 5-jugate, oblique, membranous, 
petiolulate; glands large, cuplike, sessile, but prominent; petiolules 2 to 8 mm. 
long; leaflet blades ovate-elliptic, rounded at the base, obtuse or abruptly nar- 
rowed to a broad, acute acumen at the apex, dark green above, paler and deli- 
eately reticulate beneath, those of the basal pair 4.5 to 6 cm. long, 2 to 3 cm. 
broad, those of the terminal pair 8 to 11 cm. long, 3 to 4 cm. broad, the inter- 
mediate pairs larger (up to 12 em. long and 5.5 ecm. broad). 
Inflorescences single in the axils of the upper leaves; peduncles slender, 
glabrous, 4 to 8 cm. long; receptacle globose or ovoid, glabrous; bractlets 
linear, narrow, sparsely hairy toward the apex without, 2 to 4 mm. long, per- 
sistent; flowers numerous, sessile; calyx tubular, often substipitate, 5.1 to 6.3 
(5.5) mm. long, sparsely setulose-hairy on the base and middle, densely hairy 
on the teeth; corolla tubular, slightly widening toward the apex, 8.2 to 9.7 
(8.8) mm. long, glabrous at the base, densely villous toward the apex on the 
lobes, these 0.8 to 1.3 mm, long; staminal tube included. 
Legume not known. ; 
Type in the Gray Herbarium, collected at Mapirf, Bolivia, at an altitude of 
about 800 meters, flowers, May, 1886, by H. H. Rusby (no. 1001). 
This species belongs to the group, heretofore with no Known Andean repre- 
sentative, characterized by nude folial rachis and petiolulate leaflets. In the 
absence of fruit and on account of the immature condition of the leaves it is 
not possible to determine its affinities more closely, but the type is clearly a 
distinct one, not previously described. 
TWO SPECIES PUBLISHED AS ONE, 
Harms has published lately his Jn¢a paterno, founding it, as it 
seems, on a plant distinct from the one illustrated by Preuss at the time 
of the first publication of the name.t Preuss’s references in the 
body of the same work? seem to apply to the tree widely used as 
coffee shade in Guatemala under the name of “ paterno,” the fruit, 
for instance, being characterized as short and broad. The illustra- 
tion in plate 9, however, reproduces in almost every detail the very 
distinct species cultivated on the Pacific coast of Guatemala, Chiapas, 
and Oaxaca, not only for its shade but for its long, many-seeded 
pods, which is described above under the name of J. radians. The 
pod in plate 8, figure 6, is also undoubtedly a reduction of the legume 
of this latter species. 
It is possible that both species were mixed in the material studied 
by Harms, and in the absence of the fruits their confusion was to a 
* Pages 355, 361. 
