10 Aveneae 



middle of the glume, 1-2 cm. long, geniculate; palea 15 nun. 

 long, hairy on the nerves. 



Very common Ln all the valleys and on grassy hills. Native of southern 

 Europe. 



2. A. fatua glabrescens Coas. (Bastard Oats.) Like the 

 type excepl that the flowering glumes are glabrous. In this re- 

 Bpect resembling .1. sativa I... the cultivated oat, but it is easily 

 distinguished from that by its longer and geniculate awn and 

 wide, 9-nerved flowering glume. A. sativa is awnless or has :i 

 short straight awn and a 7-nerved glabrous flowering glume. 



Occasional in our valleys. San Bernardino, Parish,; [nglewood. 



22. DANTHONIA DC. Wild Oat-grass. 



Annual or perennial grasses with flat or convolute 

 leaves and contracted or open panicles. Spikelets 3-many- 

 flowered, the flowers all perfecl or tin' upper stami- 

 : rachilla pubescent extending beyond the flowers. 

 Glumes 5-many, tin' 2 outer empty, keeled, acute, sub- 

 equal, |H'i>i>tciit. generally extending beyond the upper- 

 most flowering glume ; flowering glumes rounded <>n the 

 hack. 2-toothed, deciduous; the awn arising from be- 

 tween the acute or awned teeth, tlat and twisted ,-n base, 

 bent. Palea hyaline, 2-keeled near the margins, obtuse 

 or 2-toothed. Stamens '■'>. Styles distinct. Grain free, 

 enclosed in the glume. 



1. D. Californica Boland. Perennial, tufted; culms 4-8 dm. 

 high, erect <>r somewhat decumbent at l>ase; sheaths smooth, 

 villous or bearded at the summit ; blades Hat or convolute, 10-15 

 can. 1 < 1 1 1 lt . 3-5 nun. wide, scabrous; spikelets 1-5, terminal, 15-25 

 mm. long, usually purplish ; pedicels slender, spreading, minute- 

 ly hirsute; empty glumes equaling thespikelet; flowers usually 

 7: flowering glume about 8 mm. long, hairy mi the callus and 

 tie below the middle, teeth about 2 mm. long; awn about 

 equaling 1 he glume, scabrous. 



In dry Usually stony ground. Ncwhall, Davidson. 



