MR. G. BENTHAM ON GRAMINE Z. 121 
of characters. The long narrow spikelets are few or numerous 
in along, rigid, terminal unilateral spike; and the exceedingiy 
long capillary styles become spirally twisted together far beyond 
the glumes. There is a considerable variety in the number 
of spikelets, in the number of flowers in each from one to 
four; and even the stamens and styles are sometimes two, some- 
times three; but I have been unable to trace any connection of 
these diversities either with each other or with geographical 
stations so as to mark distinct species. 
49. Zevartes, Schreb. (Senitis, Adans., Despretzia, Kunth, 
Krombholtzia, Fourn.), has five or six tropical-American species. 
They have not all the tall habit of the preceding genera; for the 
best-known West-Indian and Central-American species, origi- 
nally described by Linneus under Apluda, is a much weaker 
plant with smaller leaves; they are, however, broad and flat, 
with the characteristic venation of the subtribe. The spikelets 
in the genus generally have one fertile flower with two to five 
male ones above it. 
I have already adverted to our eighth and last subtribe Hufes- 
tucee, or Festucee proper, as differing from Eragroste in having 
five or more nerves to the flowering glumes instead of three or 
one only. Generally speaking, they have not the several-awned 
glumes of Pappophore& and Triodie&, nor the barren spikelets nor 
long styles of Sesleriew, nor the long hairs surrounding the 
flowering glumes of Arundine&, nor the cluster of upper empty 
glumes of Melicez, nor the peculiar foliage of Centothece& ; yet 
there are here and there exceptional species showing an approach 
to one or another of these characters, and interfering much with 
any definite line of demarcation. We include in the subtribe 
twenty genera, the last five of which are further characterized by 
the adherence of the grain to the palea ; but, as already observed, 
this character is not quite constant even in Festuca, and is occa- 
sional in such genera as Poa and Briza, where the grain is 
usually free. I have been unable to discover any other cha- 
racter which would distribute the genera of the subtribe into 
more satisfactory groups. 
The first two genera have a simple racemose inflorescence. 
50. Prevropocon, Br. (Lophochlena, Nees), has three species, 
one arctic, the two others Californian, distinguished by the keels 
of the palee bearing a linear tooth or flat crest; and 51. Bryr. 
KINIA, F. Schmidt, a single Japanese species, with two empty 
