90 MR. G. BENTHAM ON GRAMINE ZE. 
tion of the rhachilla, which I have never found in C. pendula, 
Trin. (C. expansa, Link, C. latifolia, Griseb.). Several American 
or other grasses published as species of Cinna are now referred to 
Epicampes or Deyeuxia. 
27. GASTRIDIUM, Beauv., has two species from the Mediterra- 
nean region, one of them also found in tropical Africa and in 
extratropical South America, but possibly introduced only in the 
latter locality. They have the small spikelets of Agrostis, but a 
narrower closer panicle, and are remarkable for the outer glumes 
rather hardened, shining, and ventricose at the base, whence the 
generic name. The older authors included them in Alium on 
account of that hardness in the glumes. 
28. Cumrotroris, Kunth, is a single Chilian species which 
some would unite with Agrostis, and might well have been joined 
to Epicampes, but that the rhachilla is produced beyond the 
flower into a rather long hairlike seta. 
29. TRTPLACHNE, Link, is the Gastridium nitens, Coss. et Dur., 
a single Mediterranean species, with the habit, but not the ven- 
tricose glumes, of that genus, and differing both from that and 
from Agrostis in the flowering glume bearing a short awn-like 
point on each side of the awn. 
30. APERA, Adans. (Anemagrostis, Trin.), has two very closely 
allied European species extending into Western Asia, with the 
technical character very nearly of Deyeuxia, but with the elegant 
paniele and numerous small glabrous spikelets of many species of 
Agrostis, in which they are still included by some under the name 
of Agrostis spica-venti. The New-Zealand plant described by 
Hook. f. as an 4pera is now transferred to Muehlenbergia. 
31. Crynacrostis, Griseb., from Tucuman in South America, 
is unknown to me, but is said to differ from Deyeuxia in having 
the spikelets unisexual by abortion. It sbould most probably be 
incorporated in that genus. 
32. Deyguxra, Clarion (Lachnagrostis, Trin.), has now nearly 
a hundred and twenty species, dispersed over the temperate or 
mountain regions of the globe, partieularly numerous in the 
Andes of South America, and extending northwards to the Arctic 
cirele and southwards to the extreme end of South America. It 
is in some respects polymorphous, running on the one hand 
almost into Agrostis, to which some species have been referred, 
and on the other into Calamagrostis, with which the northern 
species have been often united. It differs from both in the pro- 
