GKAMINE.X. 
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Tribe IX. Aveninecc. 
22. Aira Linn. 
* Awn straight. Deschampsia, Beauv. 
1. A. ccespitosa (L.) ; panicle spreading, 1. flat, awn from be- 
low the middle of the palea and scarcely extending beyond its 
truncate jagged summit. — E. B. 1453. R. 1682— 1G86. Par. 23. 
— Root tutted. St. 1 — 3 feet high. L. rigid, roughish, their 
margins involute when dry. Branches of the panicle rough. 
Outer palea with 4 nerves in addition to that which terminates 
in the rough awn. Rudiment of the third fl. often scarcely, if at 
all, distinguishable, or, in other cases, half the length of the 
upper fl . and somewhat clavate. — Meadows, thickets, &c. P.VII. 
** Awn bent, twisted at the base. 
2. A. alpina'(L.) ; panicle rather close, 1. mostly involute, awn 
from above, the middle of the palea and scarcely extending bevond 
its acute bifid summit.— E. B. 2102. Par. 23— Height 6— 12 in. 
L. narrow, rigid, roughish on the upper surface. Branches of 
the panicle quite or nearly smooth. Outer palea with 2 nerves 
on each side of the midrib, deeply bifid and acute, not as figured 
by Par. No rudiment of a third fl. Fl. often viviparous. — Tops 
of highland mountains. P. VIII. S. 
3. A. fiexuosa (L.) ; panicle spreading triply forked with 
wavy branches, 1. very narrow subsetaceous, awn from near the 
base of the palea and extending considerably beyond its summit, 
pedicel of the second fl. less than i of its length, ligule truncate. 
— E. B. 1519. R. 16/S — 1679. Par. 24.?— St. erect, slender, 
about a foot high. L. solid, nearly terete. Upper sheaths rough 
from above dowmvards. Outer palea notched at the summit. — 
Parnell's fig. (t. 24.) and description lead me to suspect that his 
plant is the A. uliginosa (Weihe) which has 1. very narrow but 
flat or involute not solid and subterete, the pedicel of the second 
fl. equalling half its length and the ligule oblong attenuated and 
acute. If so it is a new plant for our flora. — Heathv places. 
P. VII. 
4. A. caryophyllea (L.) ; panicle spreading triply forked, glumes 
rounded at the base, awn from below the middle of the palea and 
extending considerably beyond its attenuated deeply bifid point. 
— E. B. 812. R. 1676. Par. 24. Avena Koch.— St. 6—12 in. 
high. L. short and narrow. Sheatk? roughish from below up- 
wards. Spikelets very small, rounded below, chiefly collected at 
the ends of the branches. — Dry gravelly places. A. VI. 
5. A. prmcox (L.) ; panicle somewhat spiked oblong, glumes 
scarcely rounded at the base, awn from below the middle usually 
near the base of the palea and extending considerably beyond its 
r 2 
