PITTIER——REVISION OF THE GENUS INGA, 193 
about 3 mm. long, ferruginous-pubescent ; leaflet blades ovate, oblong, or ovate- 
lanceolate, broadly rounded at the base, acute at the apex, sparsely pubescent 
or glabrescent above, with the costa and impressed veins ferruginous-pubescent, 
fulvous-tomentose and reticulate beneath, with the densely pubescent costa and 
veins very prominent; blades of the basal pair of leaflets 2.5 to 4.5 cm. long, 
1.2 to 2 em. broad, those of the terminal pair 5.5 to 11 cm. long, 2.5 to 5.5 cm. 
broad. 
Floral spikes 4 or 5-clustered and paniculate in the upper axils; peduncles 
ferruginous-pubescent, 1 to 2 cm. long; flower heads ovoid; bractlets ovate- 
lanceolate, acute, 8 to 5 mm. long, pubescent, caducous; flowers sessile; calyx 
tubular, densely ferruginous-pubescent, 5.5 to 6.5 mm, long, the teeth 1.5 to 2 
mm. long; corolla tubular, broadening to the apex, ferruginous-pubescent, 12 
to 14.5 mm. long, the lobes lanceolate, acute, 1.5 to 2 mm. long; staminal tube 
included; pistil about 6 em. long, exceeding the stamens; ovary compressed, 
sessile. 
Legume not known. 
Type in the John Donnell Smith Herbarium, collected at Cobain, Alta Verapaz, 
Guatemala, at an altitude of 1,450 meters, flowers, April, 1887, by H. von 
Tiirckheim (J. D. Smith, no, 1214). 
Distributed under the name Jnga edulis Mart., with which, however, it has 
no close affinity. It takes its place near J. hayesii on account of its 3-jugate 
leaflets and short floral spikes, but it seems to be more closely related to 
I. micheliana and If. pringlet. 
CRITICAL NOTES. 
The series Pilosiusculae and Leptanthae appear to be distinguished 
from each other only by artificial and somewhat arbitrary characters. 
In the first series the bracts are said to be “small or caducous,” 
which may be understood as if they were either small and then per- 
sistent or larger and then deciduous. As a matter of fact, in all the 
species that have come under my observation these bracts, either 
small or large, were found to be caducous or at the most, in a few 
isolated cases, to remain on the stalk only for a short time after the 
fall of the flower. In J. leptantha these bracts seem to be indefinitely 
persistent, and much longer than the calyx. 
Inga micheliana, I. pringlei, and I. mollifoliola evidently form by 
themselves a natural group, characterized by the small, 4 or 5-jugate 
leaflets. In the last two the size of the flowers is practically the 
same, and to distinguish the two former from each other it is neces- 
sary to compare details which are not especially obvious at first 
glance. This group, furthermore, corresponds to the definition of the 
Pilosiusculae and should be considered as part of this series. It is 
difficult to understand how J. micheliana could be compared by Dr. 
Harms with /. vestita Benth., a Vulpina from southern Brazil with 
nude foliar rachis and very distinct flowers, while the closely related 
I, pringlei is brought near to /. striata, although its bracts are cadu- 
