PITTIER—REVISION OF THE GENUS INGA. 215 
Inga ursi Pittier, sp. nov. 
A tree; branchlets angulate, the younger growth, rachis of the leaves, and 
peduncles densely ferruginous-hirtous. 
Rachis of the leaves winged, 8 to 14 cm. long, the petiolar part narrowly 
winged, 1.5 to 2.5 cm. long, the wings 7 to 9 mm. broad; stipules lanceolate, 
ferruginous-hairy, 5 to 10 mm. long, caducous; glands sessile, more or less 
triangular or transversely compressed ; leaflets 5 or 6-jugate, coriaceous, more 
or less oblique, subsessile or the densely ferruginous-hairy petiolules less than 
1 mm. long; leaflet blades ovate-oblong or ovate-elliptic, rounded at the base, 
obtuse or acute at the apex, sparsely hairy or glabrescent and lustrous above, 
reticulate and more or less brownish-tomentose beneath, the costa and veins 
ferruginous-hairy, very prominent beneath, the veins impressed on the upper 
face; blades of the basal pair of leaflets 4 to 7 cm. long, 1.5 to 3 cm. broad, 
those of the terminal pair 7 to 10.5 em. long, 3 to 4 cm. broad. 
Floral spikes single, geminate, or 3-clustered in the upper axils, the peduncles 
terete, 1.5 to 4.5 cm. long, the flower heads elongate, densely flowered; bract- 
lets small, ovate, acute, caducous; flowers sessile; calyx tubular, ferruginous- 
tomentellous or hirtellous, 12.7 to 18.3 (13) mm. long, the teeth acute, 2 to 
8.5 mm. long; corolla tubular, hardly broader at the apex, densely brownish- 
villous, 18.3 to 20.8 (19.5) mm. long, the lobes narrow, 3 to 4 mm. long; 
staminal tube included; pistil about 5 cm, long; ovary stipitate, 2-sulcate. 
Legume not known. 
Type in the John Donnell Smith Herbarium, collected in Colombia, at a 
point not stated but probably in the vicinity of Popayfn, by F. C. Lehmann 
(no. 5750). 
Known among the natives as “ guavo de oso,” this species may belong to the 
group of Inga insignis Kunth. The cross section of the ovary, however, though 
almost quadrangular, is not 4-sulcate, as is generally the case among the 
Tetragonae. 
Inga xalapensis Benth. Lond. Journ. Bot. 4: 616. 1845. 
A small tree; branchlets slender, subangulate, the younger parts more or 
less ferruginous-pubescent. 
Rachis of the leaves narrowly winged, densely ferruginous-pubescent at first 
and then glabrescent, 5 to 12 cm. long (or more), the petiolar part usually 
wingless but sometimes winged, 1 to 1.5 cm. long; leaflets usually 5-jugate 
(the pairs sometimes more or fewer), coriaceous, subsessile; glands small or 
medium-sized, prominent, concave; leaflet blades ovate or oblong to lanceolate, 
rounded at the base, obtuse or acute and often mucronate at the apex, sparsely 
pubescent or glabrescent and sublustrous above, the slightly prominent costa 
and the impressed, delicate veins more or less densely ferruginous-pubescent, 
beneath reticulate and densely soft-pubescent to glabrescent, the costa and 
veins very prominent, the blades of the basal pair 2.5 to 3 cm. long, 1 to 1.5 cm. 
broad, those of the terminal pair 6 to 9 cm. long, 2 to 3.5 cm. broad, or larger. 
Inflorescences more or less densely paniculate at the ends of the branchlets, 
the spikes usually geminate; peduncles and rachises densely ferruginous-pubes- 
cent, the former 2 to 4.5 cm. long; flower heads elongate, the flowers mostly 
numerous and caducous; bractlets ovate-lanceolate, acute, pubescent without, 
5 to 8 mm. long; flowers sessile; calyx tubular, slightly widening toward the 
apex, densely ferruginous-pubescent, 10.8 to 11.5 (11 mm.) long, the teeth 
narrow, acute, 3.5 to 4.5 mm. long; corolla tubular, silky-villous, 14.5 to 17.2 
(16.1) mm. long, the lobes broad, 1.5 to 3.5 mm. long; staminal tube included, 
much shorter than the corolla; pistil about 6 cm. long, the ovary sessile, gla- 
brous, about 15-ovulate; stigma capitellate, 
