132 74. Avena. 10. GR AMINES. 
PI. end. pit 
7. Avena Alpina. Alpine oat. 
Spike upright; panicle nearly spikelike; leaves naked, 
finely serrulate ; sheaths oblong, rough ; culm compressed. 
Avena planiculmis, Eng. Bot. 30, 2144. 
Avena alpina, Smith T. L. S. 10, 335. 
Trisetum alpinum, Roomer Syst. Veg. 663. 
Gaudinia planiculmis, Pal. dc Beauvais , 95. 
Mountain rocks ; perennial ; July. 
Root tufted ; culm 3 feet high ; flowrets very large ; rackis 
hairy at the top ; locustce 3 to 5-flowered. 
XXXIV. 75. ARRHENATHERUM. Beauv. Dog-grass, 
Glumes membranous, 2-flowered ; spathelles alternate, 
shorter than the flowrets: lower flowret male; lower 
spathellule 2-lobed at the tip, lobes often torn-edged,ci]iate; 
awned on the back below the middle ; tipper membranous, 
hyaline, 2-cut, toothed; lodicule lanceolate, not notched, 
smooth: upper flowret hermaphrodite; spathellules 2-cut, 
toothed ; lower awned above the middle of the back ; awn 
short or none; stigmata featherlike; cariopsis free, fur- 
rowed. — Panicle branched, loose. 
1 . Arrhenatherum elatius. Tall dog-grass . 
Panicle equally spread, rather contracted, drooping; 
glumelles smooth ; hermaphrodite flowret nearly awnless ; 
culm with smooth knots ; root knotty ; leaves smooth. 
Avena elatior, Lin. S. P. 117. 
Avena elata, Salisb. Prod. 23. 
Holcus avenaceus, tYigger FI. Holsat, 72. 
Fields and pastures; perennial; June, July. 
Culm erect, 4 feet high ; leaves dark green, flat, recurved ; 
sheaths round ; ligula short; panicle oblong; peduncles 
nearly verticillate ; spikelet large, whitish, or white and 
purple. 
/3. muticum * Flowrets awnless. 
y. sulmulicum. Hermaphrodite flovjret awnless. 
& aristatum. Flowrets with long awns. 
2. Arrhenatherum hulhosum . Bulbose dog-grass. 
Panicle equally spread, verticillate ; glumelles smooth ; 
hermaphrodite flowret nearly awnless; knots of the culm 
pubescent ; root bulb-bearing, 
