PITTIER—-REVISION OF THE GENUS INGA. 195 
Series 4. LEPTANTHAE. 
NOTES. 
This small group is poorly represented in the collections at my 
disposal. It consists mainly of species native in the eastern and 
northeastern part of South America. 
Inga acuminata Benth. Lond. Journ. Bot. 4: 600. 1845. 
From Trinidad, this species presents in its long-pointed calyx a feature con- 
sidered to be unique in the genus, but which we now find repeated in a speci- 
men distributed by the Christiania Herbarium and purporting to have been 
collected by Eggers at El Recreo, Ecuador, April 27, 1897. It must be stated, 
however, that Baron Eggers also collected in Trinidad, and that the specimen 
referred to, in the Field Museum, is not numbered, so that there is the pos- 
sibility of a label having been transposed. The two leaves on the specimen 
are 1-jugate, but all other details agree with Bentham’s description of the 
Trinidad plant. 
Inga hartii Urban is transferred to series 6, Calocephalae. 
Series 5. LONGIFLORAE. 
CRITICAL NOTES. 
Bentham and Spruce considered no. 3097 of the latter’s collec- 
tion to be merely a variety of Inga speciosa Spruce, a view that is 
not justified by the comparison of the specimens. Bentham’s variety 
lomatophylla, accordingly, is below given specific rank. 
Inga speciosa Spruce, Trans. Linn. Soc. Bot. 30: 620, 1875. 
In I. speciosa the leaflet pairs are close together, with the intermediate wings 
correspondingly short; the leaflets themselves are smaller (than in I. loma- 
tophylla), sparsely pilosulous beneath with the costa and veins slender and 
sparsely hairy; the inflorescences, although of the same type as to their ar- 
rangement as in the so-called variety, are more slender and borne on a long, 
bracteate common peduncle; in the flower, the calyx measures from 8.5 to 9.5 
mm., with teeth 1.5 to 2 mm. long, and the corolla is 82.5 to 84 mm., the lobes 
3.5 to 4 mm. long; lastly, the staminal tube is very slender and exceptionally 
long-exserted, measuring nearly 6 cm, from the base. 
Inga lomatophylla (Benth.) Pittier. PLATE 101, 
Inga speciosa lomatophylla Benth. Trans. Linn. Soc. 30: 620, 1875. 
In Spruce’s no. 8097, now accepted as the basis of a species, the distinctive 
features, aS compared with J. speciosa are: 
Rachis of the leaves more elongate, the leaflet pairs more distant with the 
corresponding modification of the wings; leaflets reticulate, coarser, and twice 
as large as in J. speciosa, with the costa and veins much stronger and the 
indument much more dense; common peduncles of the fasciculate spikes shorter 
and thick; flowers also sensibly larger, the calyx measuring 11 to 11.5 mm., the 
corolla 37 to 88 mm. long, and the staminal tube projecting to a less distance. 
These differences are sufficient, I think, to justify the elevation of the so- 
called variety to specific rank. 
EXPLANATION OF PLATE 101.—Specimen of the type collection of Inga lomatophylla, in 
the Gray Herbarium, collected near San Carlos, upon the Rio Negro, northern Brazil, 
1853-54, by R. Spruce (no. 3097). Natural size. 
