APERA. AGROSTIS. 
395 
20. Ape'ra Adans. Wind-grass. 
1. A. Spica-ven'ti (Beaiiv.) ; pan. spreading, anth. linear-ob- 
long. — Agrostis Sm., E. B. 951. Anemagrostis (Trin.) P. 17. — 
St. 1 — 2 feet liigh. Pan. very light and elegant; branches 
spreading horizontally with flowers. Awn 3 or 4 times exceed- 
ing the pale. Rudimentary fl. like a pedicel. A tuft of hair 
on each side of the inner pale. — Sandy helds, rare. A. VI. VII. 
2. A. interrup'ta (Beauv.) ; pan. close, anth. oval. — E.B. S. 
2951. — St. 1 — 2 ft. high. Pan.-branches dividing from their 
base, never spreading. Awn 3 or 4 times exceeding the pale. — 
Sandv fields. Pampisford and Chippenham, Cambridgeshire. 
Thetford, Suffolk. A. VI. VU. E. 
21. Ageos'tis Linn. Bent-grass. 
1. A. setdcea (Curt.) ; panicle close oblong, branches and pe- 
dicels rough, gl. unequal acute, lower pale jagged at the top 4- 
ribbed, lateral ribs ending in short setae, kneed and twisted awn 
from the base of the pale and twice its length, I. setaceom, sJieaths 
rough, ligule oblong acute.— ^. B. 1188. P. 83.— Root tufted. 
L. short, involute, almost capillary. Pan.-hranchcs short. Mid- 
rib of lower glume rough in its upper half, slightly excuirent. 
Upper pale veiy minute, a tuft of hairs at its base. — Dry heaths 
in the South-west. P. VH. E. 
2. A. canina (L.) ; pan. spreading when in flower otherwise 
close, branches and pedicels rough, gl. unequal acute, lower 
pale jagged at the top 4-ribbed, kneed and twisted awn from 
below the middle of and exceeding the pale, lower 1. setaceous 
tufted, stem-l. naiTow, sheaths smooth, ligule oblong acute. — • 
E. B. 1856. P. 15. — Trailing leafy shoots. St. decumbent be- 
low, then erect. L. narrow; radical involute. Pan.-branches 
long, slender. Fl. green or pui-pli.sh. Lower gl. not jagged at 
the top ; midrib rough from rather below the middle. Upper 
pale 0, or very minute. Awn sometimes very short or rarely 
absent.— Peaty heaths. P. VH. VUI. E. S. I. 
3. A. vulgaris (With.) ; ^jaw. spreading during and after 
flowering, gl. nearly equal, lower toothed on the upper part of 
the keel, ligule short truncate.— i". B. 1671. P. 12 &" 13.— St. 
long, ascending or decumbent below and rooting at the knots, 
sometimes with long prostrate stoles. Sheaths mostly smooth. 
Pedicels toothed. Fl. rarely awned. — j3. A. jmmila (Lightf.) ; 
caespitose, st. 2 — 3 in. high, fl. often awned usually infested with 
smut. — Rather di-y places. P. VII. E. S. I. 
4. A. al'ha (L.) ; pan. compact after flowering, glumes nearly 
equal, lower toothed throughout its keel, ligule long acute. — 
