88 MR. G. BENTHAM ON GRAMINEE. 
distinct species (E. rigens, Benth.) with a still longer and nar- 
rower rigid spikelike paniele often interrupted ; and the spikelets 
are small, with membranous glumes, as in the typical E. stricta, 
Pres], but awnless or nearly so. 
21. BAUCHEA, Fourn., a single Mexican species unknown to me, 
might perhaps be reduced to Epicampes, from which it is said to 
differ chiefly in a great inequality of the two empty glumes. 
22. Agrostis, Linn., even after being shorn of a number of 
heterogeneous plants ascribed to it at various times from general 
aspect, and after the suppression of numerous names given to 
local representatives of cosmopolitan species, is stil a genus 
of nearly a hundred species, generally spread over nearly the 
whole world, but especially common in the temperate regions 
of the northern hemisphere. Among the Euagrostee without 
any continuation of the rhachilla they are generally known 
by the absence of those peculiarities which have induced the 
separation of several of the preceding as well as of the follow- 
ing genera, by the thin short broad flowering glume with the 
dorsal awn below the middle, and by the palea not more than 
half as long as the glume, aud often quite minute or even defi- 
cient; the panicle is also usually loose, very elegant; with nume- 
rous small spikelets or almost capillary branches and pedicels. 
There are, however, here, as elsewhere, exceptional species which 
defy all neat classification ; even the dorsal awn is sometimes re- 
duced to a minute tubercle, or only to be guessed at by the abrupt 
termination of the central nerve of the glume. The American 
species in which the palea is minute or deficient formed Michaux's 
genus Trichodium, which has been extended to the European 
A. canina, Lünn., and others with that character, to which Beau- 
vois restricted the Linnean name Agrostis, whilst he gave the name 
of Agraulus to the species in which the palea is more developed. 
23. Cuzrumus, Link, is a single Spanish annual, much like 
some species of Agrostis, but anomalous in the group in having 
the lowest (empty) glume larger than the others, and produced 
into a long awn, whilst the flowering one, though shaped as in 
Agrostis, has no awn. The inflorescence is also peculiar, each 
branch of the panicle terminating in the three shortly pedicellate 
spikelets. 
24. AncTAGROSTIS, Griseb., is a single aretie species, referred 
by Brown doubtfully to Trinius's genus Colpodium, but which 
appears to be more nearly allied to Deyeuzia. It is, however, 
