2 
aminae lanceolatae, acutae, 1-2~—2 ¢ , mm. | , rigidulae, 
infra adpresse pilosae, ad 20-nerves, nervis arcte approximatis supra 
prominentibus ulis. Inflorescen (a o infimo) 2- 
longae, axi angulari vel superne applanato angulis laevibus ; rami 8-2, 
patentes, infimi 5-7 mm. longi, dorso s ubconvexi et laev es, ad ma cel 
pilis tenuibus rigidis tuberculo insidentibus ciliati. Spiculae 1-7-2 m 
longae. umae paulo 1 mm. excedentes. Anthoecium superum vix 
“mm. ongum, valva ad margines pilosula. Antherae anthoecii 
inferioris 0°83 mm. longae. Caryopsis 0°5-0°6 mm. longa. Embryo 
0°18 mm. longus, scutello late elliptico. 
TropicaL Arrica: Northern Nigeria ; Nupe, in swamps Barter, 1348 : 
French Congo; Snussi Country (Chari oriental), at the sources of the 
Ndelle River, Chevalier, 6825. 
ere can be no doubt as to the affinity of this remarkable grass ; 
the diioulty lies rather with its Lpraeree status, whether it should 
be treated as a distinct genus, and if not, to which of the two genera 
named in the differential diagnosis, Vv1z. 1 pie and Coelachne, it should 
be referred. Coelachne was placed by Bentham with the Aveneae in 
net mee and Hooker’s Genera Plantarum, and Hackel treated it in the 
ame way in his classification of the grasses in Engler and Prantl’s 
Rutatiche cn ee The oe however (Journ. Linn 
So : sb aces 
connecting or converging oe will perhaps find no difficulty in 
reducing Oe to Lsachne ; but to be consistent they would have to 
merge Isachne in Panicum, ite Panicu lum 
h 
one, or even more than one, direction ‘ pass’ into other genera. If, 
on this ground, /sachne and Coelachne are allowed to stand as distinct 
to produce two fertile florets, ae correlated with it the tendency 
sears disarticulation of the rhachis between them and to a lesser 
degree below them, instead of shedding the whole spikelet as is the 
case in the more typical Paniceae where each —— develops only one 
grain, achne, the in floret is always hermaphrodite and has 
the typical Pacanatnete The tae is Bree 
such forms might purely batiieaglls be claimed for Panicum. It 
pts shows frequently, even if hermaphrodite, that approach in shape 
and structure of its valves to the shvabieed glumes which is tei charac- 
teristic of the reduced lower floret of Panicum. In Heteranthoecia 
