56 
Mr. Woops on the Genera of European Grasses. 
so, and we sometimes observe a small mucro on the outer palea of Sclerochloa ; 
the others are constantly unarmed. 
42. 
43. 
50, 
52. 
46. 
58. 
. Keleria. 
. Trisetum. 
1. Glumes nearly or quite as long as the spicula. 
Aira. Glumes 2-flowered, without any rudiment. Awn, if any, dorsal, 
geniculate and twisted. The palez in some species harden on the seed, 
but without adhering to it. 
Deschampsia. Glumes 2-flowered, with usually the not club-like rudi- 
ment of a third. Outer palea truncate, with a straight awn, from near 
the base; surrounded with soft hairs. 
. Melica. Glumes nearly equal, larger than the palez, 1- or 2-flowered, 
with the additional stalked, club-like rudiment of 1 or 9 more. Paleæ 
unarmed, membranous, hardening on the seed. 
Danthonia. Glumes 2 or more flowered. Outer palea smooth and coria- 
ceous below, membranous and nerved above, emarginate, with an inter- 
mediate broad tooth, sometimes terminated with a geniculate and twisted 
awn. ' 
Schismus. Glumes many-flowered, much larger than the palea, membra- 
nous, ribbed, with a scariose margin. Outer palea similar, subtruncate. 
(According to Palisot de Beauvois, there is a terminal seta.) 
Glumes and outer palea herbaceo-scariose ; the latter entire, 
acute, or with a terminal or subapicular, not geniculate seta. Spicule 
ovate. 
Glumes and outer paleæ keeled, membrano-scariose, without 
prominent nerves. The latter ending in two teeth, with a slender dorsal 
2. Glumes decidedly falling short of the spicula. 
Poa. Glumes nearly e 
: qual. Outer palea compressed, keeled, membranous, 
‘With a scariose margi 
n, entire, somewhat acute, unarmed. Panicle equal. 
