AVENA.—-ARRHENATHERUM. 387 
952.—St. about a foot high. Radical 1. and sheaths hairy. Li- 
gule very short, obtuse. Spikelets yellowish. Upper glume ob- 
long-lanceolate acuminate. Floral axis hairy, hairs short.— 
Fields. P. VII. 
27. Avena Linn. 
* Upper glume 5—9-nerved. Spikelets ultimately pendulous. 
1. A. fatwa (L.); panicle erect, spikelets about 3-flowered 
drooping, fl. shorter than the glumes hairy at the base, outer 
pale bifid at the end.—E. B. 2221. P. 27.—Height 3 feet. FI. 
with long fulvous hairs at their base by which it may be distin- 
guished from A. sativa, the cultivated Oat.—Corn-fields. A. 
VIL. Wild Oat. 
2. A. strigosa (Schreb.); panicle secund, spikelets of about 
2 fl. drooping, fl. as long as the glumes, outer pale ending in 2 
long straight bristles—E. B. 1266. P. 26.—Height 3 feet. 
Very like A. sativa but readily distinguished by the bristles at 
the end of the fl—Corn-fields. A. VII. 
** Upper glume 3-nerved. Spikelets erect. 
3. A. pratensis (L.); panicle erect with simple or slightly di- 
vided branches, fl. erect 3—6 longer than the glumes, l. scabrous. 
—E. B.1204, P. 52.—Height nearly 2 feet. St. usually nearly 
round. L. usually short, narrow, acute. Branches of the pa- 
nicle generally simple bearing only one spikelet.—8. longifolia 
(Part) ; 1. much longer.—y. alpina; st. often compressed and 
sheaths carinate, branches of the panicle often bearimg several 
spikelets, spikelet with more numerous fl., inner pale less acute, 
1. broader. I believe that none of these characters are permanent. 
E.B.2141. P.53.—A. planiculmis of Hooker (£. B. 8. 2684.) 
appears to me to belong to this species, differmg in its greatly 
compressed st., strongly keeled sheaths and more branched pa- 
nicle. In @. and @. the lowest fl. sometimes slightly falls short 
of the longer gl., in y. exceeds it—Dry pastures and mountain- 
ous places. P. VI. 
4. A. pubescens (L.); panicle erect nearly simple, fl. erect 2 or 
3, scarcely longer than the glumes, lower J. and sheaths hairy.— 
E. B. 1640. P. 53.—Height 1—2 feet—Chalky and limestone 
districts. P. VII. 
28. ARRHENATHERUM Pal. de Beauv. 
1. A. avenaceum (Beauy.); 1. flat.—Holcus Sms E. B. 813. 
P. 25.—Height 2—3 feet. Root fibrous. Knots of the st. gla- 
brous sometimes downy.—f. A. bulbosum (Lindl.); base of the 
st. with swollen knobs, knots downy. P. 26. I i plant 
s 
