evil. GRAMINE-E. 
541 
Aira.] ' 
awn (in the flowering specimens) inserted above the middle and 
scarcely exceeding the glumes in length. Pam. Gr. tt. 23, 
109. A. laevigata Sin. : E. B. t. 2102. 
Moist rocks on the higher Scottish mountains and in Wales, usually 
viviparous. fl. 6, 7. — Perhaps a mere variety of the last species, 
from some states of which it is only to be distinguished by artificial 
characters. About 1 foot high, very smooth. Leaves only scabrous 
to the touch on the upper side, short. Panicle rather small, branches 
erect; the lower ones, when viviparous (which they mostly are), 
patent and even drooping. Spikelets not numerous, larger than in 
A. ccespitosa a., and more resembling, as does the whole plant, the 
var. 0. and A. flexuosa. Glumes equal, quite smooth. Florets with 
a short tuft of hairs at the base. Glumellns lanceolate, not compressed, 
outer one slightly toothed at the end. Awn flat at the base and usually 
twisted in flowering specimens; but in viviparous ones straight and 
subterminal, often a mere point, while the florets are almost quite 
glabrous at the base. 
3. K. fiexu6sa L. ( waved i/.) ; panicle (when flowering) dif- 
fuse, glumes roughish on the midrib, upper with a central and 2 
obscure lateral ribs, florets villous at the base as long as the 
glumes, awn bent slightly twisted inserted near the base of but 
much longer than the glumella, leaves setaceous. — a. lower 
floret scarcely longer than the glume. E. B. t. 1519: Pam. 
Gr. tt. 24, 107. — /3. montana; more slender, lower floret longer 
than the glume. Parn. Gr. t. 108. 
Heaths and hilly places ; abundant. — 0. Highland moors, among 
heather. If.. 7 Habit of the last, but taller. Florets larger than 
in the two preceding species, and with the awns protruded consider- 
ably beyond the glumellas : the last are much the same in all the 
three. Ligule of the uppermost leaf bifid. 
** Outer glumella bijid, ultimately somewhat cartilaginous and enclosing 
the caryopsis. Awn bent, twisted, Iiudimentary neuter floret none. 
Glumes both 1 -nerved. 
4. A. caryophyllea L. (silvery H.) ; panicle divaricate, spike- 
lets obtuse at the base, florets scarcely villous at the base shorter 
than the glumes, awn inserted below the middle longer than the 
glumes, leaves setaceous. E. B. t. 812 : Parn. Gr. t. 24. 
Gravelly hills and pastures, frequent. 0. 6, 7. — Culms tufted, 
2 — 6 or 8 inches high. Leaves short, few. Panicle trichotomous. 
Florets silvery-gray. Glumes nearly equal, ovate, gibbous at the base, 
1-nerved, the upper part pellucid and white. Glumellas scabrous at 
the back, ultimately brown, firm, and inclosing the caryopsis; apex 
bifid. 
5. A. prce'cox L. (early H.) ; panicle contracted oblong, 
spikelets somewhat acute at the base, florets scarcely villous at 
the base about as long as the glumes, awn inserted below the 
