48 Mr. Woops on the Genera of European Grasses. 
SECALE seems better separated from Triticum on the small and inefficient 
glumes, and on the tapering form of the outer palea, than on the number of 
florets. 
I have not before me a sufficient number of Species to affix new limits to 
the genera Exxuus and Horpevm, but I am inclined to find the distinction in 
the setaceo-aristate glumes, and perhaps in the long awns or setze of the latter 
genus. The number of florets does not seem to afford a satisfactory line, 
since E. europeus, which is described as two-flowered, is certainly more com- 
monly met with, as is observed by Sir W. Hooker, having only one, and indeed 
I have never found in the specimens I have examined two perfect florets. The 
rudiment of the second is usually a mere stalk, and the whole structure of 
the flower exactly like that of Hordeum pratense. E. crinitus has usually a 
distinct palea, perhaps two, to the second floret, but as far as I have seen, it 
is always empty. These two species, and probably two or three more, not 
natives of Europe, would on my scheme be joined to Hordeum; but I do not 
know how far it would be possible to draw a line throughout the genus in ac- 
cordance with the habit of the plants. 
PAPPOPHOREZ. 
This is a very small tribe, containing in the whole only 7 genera, and 28 
species. In Europe we have only 1 species, which is particularly interesting, 
as it enables our Flora to yield an example of every tribe into which the 
Grasses have been divided. The leading characters seem to be the thin and 
entire glumes united to coriaceous and many pointed paleze. 
Echinaria. Spiculæ sessile, crowded 
ered, of which not more than the two lower are perfect. Glumes ending 
ma seta. Outer palea with five, inner with two points. Seed hairless. 
> placed all round the rachis, 2—4-flow- 
edgewise on the spike, whic 
round. According to Kunth, the second imperfect floret, where it occurs, 
Sn Some genera above, and in some below the perfect one. Is this to be 
considered as an indication that he has united two tribes into one? or that 
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