MR. G, BENTHAM ON GRAMINES. 113 
CALAMOCHLOA, are unknown to me. They are placed by the 
author in Arundinee ; but both would appear, from the short 
character given, to have a rather different inflorescence. 
We have formed our fourth subtribe Sesleriee of ten genera, 
all except the monotypic Elytrophorus extratropical, and con- 
nected together for the most part by inflorescence as well as by 
Structural characters. These are, however, not without excep- 
tions. The spikelets are usually collected together in little heads 
or close clusters, which are themselves closely clustered in a dense 
globular or spike-like paniele; and at the base of the head or 
panicle are usually a few barren spikelets or empty glumes, or, 
sometimes single glumes, which I have elsewhere, though as I 
now believe erroneously, designated as bracts subtending the 
branches of the inflorescence. In two genera the whole inflo- 
rescence is reduced to two or three spikelets sessile in a cluster 
of floral leaves. In structure the flowering glumes are variable 
in their nerves; but the styles, in almost all the genera, are long, 
with barbellate or very shortly plumose stigmatic branches, 
forming an exception to the tribe, which has induced several 
botanists to refer Sesleria itself to the Panices, from which it 
differs so widely in other characters. We include the following 
genera in the subtribe :— 
18. MONANTHOCHLOE, Engelm., is a single Texan species, ano- 
malous in habit and character, well described and figured by 
Engelmann, It has been compared to Buchloe on account of its 
unisexual spikelets and ereeping habit; but the two sexes in 
Monanthochloe are very similar to each other, and there is no 
indication in the inflorescence of any affinity with Chlorides. 
19. Munroa, Torr., has now three or four species, two or three 
from extratropical South America having been recently added to 
theoriginal Mexican-Texan one, figured in the last part of Hooker's 
Icones. 'The genus is a perfectly isolated one, showing only 
some slight affinity with Monanthochloe, especially in the very 
few spikelets sessile within a cluster of floral leaves; they are not, 
however, unisexual as in that genus. 
20. Ecuiwamra, Desf. (Panicastrella, Meench), a single well- 
known Mediterranean species ; 21. AMmocutoa, Boiss. (Cephalo- 
chloa, Coss. & Dur.), two Oriental or North-African species ; 
and 22. UROCHLANA, Nees, a single South-African species figured 
in the last part of Hooker's Icones, require no further comment 
on the present occasion. 
