SESLERIA.—AIRA. 385 
at the joints as erroneously stated in E. B.S.” Borrer. L. broad, 
rough-edged ; uppermost horizontal at the flowering season. 
Panicle rarely, if ever, protruded in this country, mostly inclosed 
in the sheath of the uppermost leaf—Marsh-ditches in Sussex 
and Hampshire. P. VIII. IX. 
Tribe IX. Sesleriee. 
22. Sesteria Scop. 
1. S. caerulea (Scop.); raceme ovate slightly 1-sided, outer 
pale terminating in 4’ teeth, the dorsal rib rough with a short ex- 
current point, 1. abrupt with a minute rough pomt.—E. B. 1613. 
P. 27.—Roots tufted. St. 6—12 in. high. Raceme about half 
an in. long, bluish-purple. Styles combined. Stigmas very long, 
linear, at first combined almost to the summit, afterwards sepa- 
rate.—Mountains. Banks of the Shannon, I. P. IV. V. 
Tribe X. Avenee. 
23. Lacurus Linn. 
[l. L. ovatus (L.).—E. B. 1334. P. 88.—St. 4—12 in. high. 
L. broad, lanceolate. Spikes ovate, soft, with long protruded 
awns.—Sandy places in Guernsey. A. VI. VII.] 
24, Arra Linn. 
* Outer pale truncate, jagged. Nut free, not furrowed on the back. 
+ Awn straight. DescHampsia Beauv. 
1. A. cespitosa (L.); panicle spreading, 1. flat, gl. slightly 
rough at the midrib, awn from below the middle of the pale and 
scarcely extending beyond its summit.—#. B. 1453. P. 23.— 
Root tufted. St. 1—4 feet high. L. rigid, roughish, their 
margins involute when dry. Branches of the panicle rough. 
Outer pale 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 up- 
per fl. and somewhat clavate—f. brevifolia (Parn.); radical 1. 
short, sheaths and st. smooth, panicle small. P.106. Vivipa- 
rous states are often called A. alpina and produce scions.—y. lon- 
giaristata (Parn.); awns exceeding the fl., sheaths rough. P.105. 
—Meadows, thickets, &c. 8. and y. Mountains. P. VII. 
+t Awn bent, twisted at the base. 
2. A. alpina (L.); panicle close, 1. mostly involute, gl. smooth 
on midrib, awn from above the middle of the pale and scarcely 
s 
