PITTIER—REVISION OF THE GENUS INGA. 177 
more or less obsolete in the mature leaves; petiolules 2 to 3 mm. long, 
pubescent; leaflets small, elliptic-lanceolate to ovate-elliptic, oblique, subcuneate 
at the base, acute, subacuminate, or emarginate at the apex, coriaceous, glabrous 
above except on the impressed, more or less pubescent costa and veins, glabrous 
or subglabrous beneath with prominent, pubescent costa and veins, the blades 
of the lowest pair 2 to 5 cm. long, 0.9 to 1.8 cm. broad, those of the apical pair 
6 to 8.5 cm. long, 2 to 2.5 cm. broad. 
Inflorescences single or geminate, axillary at the ends of the branchlets; 
umbels short-pedunculate, the peduncles ferruginous-tomentose, 1 to 1.5 cm. 
long; bractlets naviculiform-spatulate, ferruginous-pubescent, 2 to 3 mm. Jong; 
pedicels densely pubescent, 3.5 to 4 mm. long; calyx tubular-subcampanulate, 
8.5 to 4.2 mm. long, the teeth acute, of irregular length; corolla densely villous, 
tubular-funnelform, 5.2 to 5.9 mm. long, the lobes about 1.2 mm. long; staminal 
tube hardly exserted; ovary about 2 mm. long, thick, glabrous; style usually 
longer than the stamens. Young pods densely ferruginous-tomentose, the ma- 
ture ones not known. 
Type in the Herbarium of the New York Botanical Garden, collected at Bis- 
marck, above Penonomé, Province of Coclé, Panama, flowers and young pods, 
March 5, 1903, by R. 8S. Williams (no. 285). 
This species, which belongs with Inga lallensis Spruce and J. sellowiana 
Benth. in the group of the Leptingae characterized by short pedicels, differs 
from all others heretofore described by its tomentose inflorescence, short-pe- 
dunculate umbels, and small leaves. 
NOTES ON CRITICAL SPECIES. 
Inga portobellensis Beurling, Svensk. Vet. Akad. Handl. 1854: 122. 1856. 
PLATES 83, 84. 
Although published long before his Revision of the Suborder Mimoseae, Ben- 
tham did not mention this beautiful species, discovered at Porto Bello, Panama, 
by Billberg, and collected more recently (1896) by Tonduz around Santo 
Domingo de Osa, Golfo Dulce, Costa Rica (Inst. Fis. Geogr. Costa Rica, no. 
9879). Its affinities seem to be with the section Leptinga. 
EXPLANATION OF PLATES 85, 84.—PI. 83, a characteristic flowering specimen of Inga 
portobellensis collected in Costa Rica by Tonduz (Inst. Fis. Geogr. Costa Rica, no. 9879), 
distributed by Capt. John Donnell Smith as no. 7021; specimen in U. 8. National 
Herbarium. Pl. 84, fruit of a specimen of the same collection in the Costa Rican National 
Herbarium. Both natural size. 
Inga cordistipula Mart. Herb. Fl. Bras. 111; Fl. Bras, 15° 467. pl. 123. 1876. 
This species is evidently more closely related to I. paterno Harms and J. 
radians Pittier, both of which will be described in this paper, than to any 
species of the section Leptinga. On the other hand, the last-named two 
species undoubtedly belong to the section Diadema, to which the former should 
be transferred. 
Inga tarapotensis Spruce, Trans. Linn. Soc. 30: 609. 1875. 
Placed by Bentham in the section Bourgonia, but evidently belonging in 
leptinga. The type number, Spruce 4221, is represented in the Gray Herba- 
rium and shows an umbellate inflorescence, with short-pediceled, glabrous 
flowers. 
A specimen in the Otto Kuntze Herbarium at the New York Botanical 
Garden, also labeled I. tarapotensis, is quite distinct and may belong to Pseud- 
inga. It is, however, too imperfect for identification. 
