PITTIER—REVISION OF THE GENUS INGA, 175 
4 to 5 mm. long; leaflet blades obovate or oblanceolate, cuneate at the base, 
rounded and abruptly acuminate at the apex, coriaceous, finely reticulate and 
glabrous on both faces, those of the lower pair 7 to 10 cm, long, 3 to 4.5 cm. 
broad, those of the upper pair 7.5 to 14 cm. long, 8 to 5.5 cm, broad; stipules 
small, ovate, ferruginous-tomentose, caducous. 
Inflorescences axillary, single or geminate; peduncles 1 to 5 cm. long, ferru- 
ginous-pubescent; bracteoles persistent, navicular, pubescent, about 2 mm. 
long; pedicels 3 to 11 mm. long, ferruginous-pubescent; calyx 4.5 to 5 mm. 
long, pubescent, but the pubescence shorter than on the pedicel, tubular or 
subcampanulate, the teeth short (about 0.5 mm. long), with rounded sinuses 
between; corolla 8 mm. long, densely sericeo-pubescent, the lobes acute and 
deeply cleft (about 1.1 mm. long) ; staminal tube about 7 mm. long, included ; 
ovary about 2 mm. long, ovate-fusiform, glabrous. 
Legume not known. 
Type in the U. S. National Herbarium, no. 601736, collected in a coffee plan- 
tation at Aguas Negras, Venezuela, on the seaward slope of the coast range, 
near Antimano, State of Miranda, flowers, April 7, 1913, by H. Pittier (no. 
6012). 
This species is used as a shade tree in the coffee plantations and is locally 
known as “guamo de hierro.” On account of its hairy flowers it belongs to 
the Inga quaternata group, but it differs from that species in having smaller 
flowers, with the calyx not striate, and a lesser indument upon the 2-jugate 
leaves, 
The name is given in honor of Mr. William R. Maxon, Associate Curator of 
the U. S. National Herbarium. 
EXPLANATION OF PLATE 81.—Photograph of the type specimen of Inga mazoniana. 
Natural size. 
Inga roussoviana Pittier, sp. nov. Puiate 82. 
A small tree; branchlets subglabrous, densely covered with ferruginous 
lenticels; young growth densely ferruginous-tomentose. 
Rachis of the leaves subangulate, glabrous or more or less ferruginous- 
pubescent, 5.5 to 15 cm. long, the petiolar part 1.5 to 4 em. long; leaflets 3 or 
4-jugate, coriaceous, short-petiolulate ; glands small, sessile, subglobose, often 
obsolete; petiolules 3 to 4 mm. long, thick, dark-colored, more or less pubescent ; 
leaflet blades glabrous or glabrescent, obovate or ovate, cuneate at the base, 
rounded and obtuse, acute, or abruptly acuminate at the apex, those of the 
basal pair 3.5 to 6.5 cm. long and 1.5 to 3.5 em. broad, those of the terminal 
pair 9 to 18 cm. long and 3.5 to 8.5 cm. broad; costa and veins glabrous or 
pubescent, slightly prominent above, strongly so beneath; stipules ovate, about 
5 mm. long, densely ferruginous-tomentose. 
Inflorescences paniculate on short axillary or terminal shoots. Umbellules 
single or 2 to 4-fasciculate at the defoliate nodes; peduncles grayish or brown- 
ish tomentose, 0.8 to 1.5 cm. long. Flowers long-pedicellate ; bractlets very 
small, ovate, ferruginous-hairy ; pedicels pubescent, 4 to 7 mm. long; calyx 
tubular, broadened at the apex, pubescent, about 5 mm. long, the teeth acute; 
corolla long-funnelform, 9 to 11 mm. long, densely silky-villous or pubescent 
without, the hairs shorter on the lobes, these 2 to 8 mm. long; staminal tube 
included or slightly exserted; ovary sessile, obconical, glabrous, about 2 mm. 
long. 
Legume 11 to 17 cm. long, pedunculate (the peduncles 0.5 to 0.8 em. long), 
ferruginous-pubescent, rounded at the base, apiculate, the valves flat but 
slightly swollen over the seeds, 2 to 2.2 cm. broad, the margins 5 to 8 mm. 
broad, 2-sulcate and prominent around the valves; seeds 15 to 21. 
