66 
ENGLISH BOTANY. 
leaves 2 to 6 inches long by ^ to | inch broad, rather smoother than 
those of A. cfEspitosa; the panicle from 1 to 4 inches long, with fewer 
and considerably larger spikelets than in A. c«spitosa, vars. a and )3, 
but undistinguishable from those of var. 7, except by the smoother 
midrib. I have never gathered any but viviparous specimens, and all 
my Scandinavian specimens of A. alpina are also vi\dparous. 
I can see no invariable difference between A. cajspitosa and A. alpina, 
except that in the former the awn is inserted below the middle of the 
pale, and in A. alpina above it. The awn in A. alpina is certainly not 
more bent nor more twisted at the base than that of A. casspitosa. 
Alpine Hair- Grass. 
Section II.— AVENELLA. Koch. 
Perennial. Spikelets scarcely compressed, mth 2 perfect florets, but 
no third rudimentary one, the second floret distinctly stipitate. Lower 
pale subscarious, slightly rough with minute blunt points, not hard- 
ening over the caryops, truncate and denticulate at the apex. Awn 
dorsal, evidently twisted at the base, geniculate. Florets with con- 
spicuous hairs at the base. 
SPECIES n.-AIR A PLEXXJOSA. Mm. 
Plate MDCCXXXH. MDCCXXXHE. 
Perennial. Caespitose. Radical leaves filiform, setaceous, chan- 
nelled, or folded together, without evident ribs, nearly smooth, dull 
green or glaucous. Stem leaves few, rough, the upper one much 
shorter than its sheath; sheaths slightly rough (at least the lower 
ones); ligule prominent, obtuse or acute, split. Panicle very lax, 
erect or drooping at the apex, open while in flower, and partially so 
after flowering. Panicle-branches capillary, flexuous, spreading or 
ascending-spreading, slightly rough, the secondary branches mostly in 
pairs, suberect or ascending. Spikelets rather few, on pedicels, longer 
or shorter than the spikelets. Lower pale truncate, and with 4 small 
teeth at the apex. Awn dorsal, from near the base of the pale, 
twisted in the basal half, geniculate in the middle, about half as long 
as the pales and glumes. Second floret shortly stipitate; third floret 
wholly absent; axis pubescent beneath the florets or throughout. 
