134 77. Aira. 10. GRAMINEiE. Pl.end.ph. 
Gramen avenaceum q. Gramen parvum praecox, panicula (potius spica) 
laxa canescente, Raii Syn. 407, 10. 
Aira praecox, Lin. S. P. 97. 
Avena praecox, Pal. de Beauvois. 
Avena pusilla, Web. Holsat. 9. 
Barren sandy places; annual; May and June. 
Culm erect, 3 in. high, very smooth, pale green ; sheaths 
inflated, angular, smooth; panicle erect; locustce upright. 
2. Aira caryophyllea. Clove hair grass. 
Panicle diverging, 3-forked; peduncles rather straight; 
lase of the spathellules rather naked ; awn scarcely longer 
than the glumes ; ligula long, acute. 
Gramen avenaceum q. Gramen paniculatum locustis parvis purpuro- 
argenteis annuum, Raii Syn. 407, 7. 
Avena caryophyllea, Lin. S. P. 97. 
Sandy places; annual; July. 
Culm branched at bottom, leafy; sheaths slightly striated; 
panicle 3 or 4-forked ; locustce small, silvery purple. 
b. Spathelles unequal ; spathellules awned at the lase ; 
Jlowrets pedicelled ; perennial. 
3. Aira flexuosa. Bent hair grass. 
Leaves long, bristlelike, smooth; ligula short, blunt; 
panicle expanding ; peduncles in pairs, flexuose ; awn 
double the length of the spathellules; spathellules toothed, 
spinous. 
Gramen avenaceum q. Gramen paniculatum locustis parvis, purpuro* 
argenteis, majus et perenne Doody, Rail Syn. 407,8. 
Aira flexuosa, Lin. S. P. 96. 
Wet mountainous places; perennial; June, July. 
Roots in tufts; culm 18 in. high, smooth, round, nakedish; 
leaves radical, fascicled, smooth, shorter than the culm ; 
sheaths rough ; locustce small, whitish. 
4. Aira selacea. Bristly hairgrass. 
Leaves short, bristlelike, rough ; ligida long, acute ; pa- 
nicle rather contracted; peduncle becomes flexible; awn 
double the length of the spathellule; spathellules toothed, 
spinous. 
Aira setacea, Huds. FI. Angl. ed. I. 
Aira flexuosa j8, Smith FI. Brit. 85. 
Aira montana, Willd. Sp. PI. 1,379. 
Avena montana, Web . Holsat. 9? 
Aira scabro-setacea, Knapp Gram. 32. 
Woods and heaths; perennial; July. 
