570 FLORA NIGRITIANA. 
The Erianthus? repens, Beauv., from Guinea, Elionurus 
elegans, Kunth, from Senegal, and Anthistiria glauca, Desf. 
from Guinea and North Africa, are not in the collections 
before us. 
1. Andropogon (Heteropogon) contortus, Linn.—Accra, Don; 
on the Quorra, Ansell; Senegal to Benin, South Europe, 
and all over Africa and East India; also in Mexico and some 
parts of South America, perhaps introduced from the Old 
World. 
The rhachis in this species is smooth, or more or less pubes- 
cent, but usually very slightly so, and it appears very difficult 
to distinguish the A. Allionii as a species. As a genus, Hete- 
ropogon, and several others dismembered from Andropogon, 
ought probably to be adopted, but the whole of this extensive 
group has been left in such a state of utter confusion in Kunth’s 
Enumeratio, and the new genera of Nees and others, hitherto 
applied only to so few ‘of the total number, that I have been 
unable to make use of them on the present occasion, without 
entering into that close examination and comparison of the 
East Indian species, which it is understood that Professor Nees 
bas made, and which the limits of the present work do not 
now admit of. It is to be hoped that that distinguished 
agrostologist, may shortly publish the results of his labours in 
his “Glumacee Indie Orientalis, so often quoted in his 
Plante Meyeniane and Flora Afriez Australioris. 
2. Andropogon Donianus, Benth.; culmo ramoso vaginisque 
levibus, spicis longe peduneulatis solitariis muticis, rhachi- 
bus sericeo-barbatis, spiculis geminis, hermaphrodite gluma 
exteriori bimucronata  pectinato-ciliata, neutrius pedicel- 
late acuminata integra.— Sierra Leone, Don. 
Culmus rigidus, teres v. leviter compressus, nitidus. Vagine 
compresso-carina| > Striatz, inferiores equitantes distiche. 
Folia rigidula, complicata, glaucescentia, superiora brevia. 
Spice a vagina superiore 6-8 pollicibus distantes, bipollicares. 
Rhachidis pili patentes, spiculis breviores. Gluma exterior 
spiculæ hermaphroditæ 2-2} lin, longa, cartilaginea, tenuiter 
multinervis, costis 2 validioribus submarginalibus eleganter 
