Mr. Woops on the Genera of European Grasses. 29 
totally wanting; but I have already stated in my observations on that tribe 
the reasons which induce me to place it here. The want of any trace of an 
exterior rudiment, as well as the more delicate texture of the paleæ, keep them 
away from the Paniceæ and Phalarideæ, and they have not those long silky 
hairs which distinguish the Arundinacee. The last character is, I must con- 
fess, the least satisfactory, for some species of Agrostis have soft hairs and 
not very short ones, so that without the smaller size and more delicate tex- 
ture of the plant one might be at a loss in which tribe to place it. 
Genera: | 
1. Polypogon. Glumes scariose, furnished with a long seta! Pale nearly 
equal, filmy, included. Awn dorsal, or none. 
2. Milium. Glumes herbaceo-scariose, hardly exceeding the membrano-co- 
riaceous pale. Palez nearly equal, unarmed, hardening on the seed! 
3. Agrostis. Glumes membranous, acute. Paleæ smooth, scariose, unequal 
in length, the inner sometimes wanting. The awn, if any, is dorsal. 
4. Vilfa. Glumes unequal, falling short of the paleæ, both membranous. 
Pale nearly equal, unarmed. — 
5. Coleanthus. Glumes 0; flowers solitary; paleæ unequal; the outer with 
a rough keel, terminating in a short seta. Stamens 2! 
6. Knappia. Inflorescence in a raceme, somewhat one-sided. Spiculæ trun- 
cate. Pale included, scariose or filmy, shaggy, the inner minute or 
wanting. 
The awn is wanting in Polypogon maritimum; where it occurs it is easily 
separable from the corolla, and is therefore a true awn. The long terminal 
seta of the glume in this genus is very remarkable, separating it at once from 
almost all others. Smith and Hooker describe it as strictly terminal. To 
me it seems to be placed a little below the extremity. 
Miuium. M. effusum is the only European species left by Kunth in this 
genus, and he places it among the Paniceæ, considering the part which bas 
the appearance of an inner glume, and which is quite similar in form and tex- 
ture to the outer glume, as a neutral floret. There is nothing in the structure 
or disposition of the parts to countenance such an hypothesis, and I therefore 
consider it as belonging to the Ægrostideæ. Viura of Link offers only one 
