(305 ) 
3. ELoncaTA Hook. Glumes longer than 
the florets; panicle long and narrow, its rays 
unequal, distant, mostly appressed.—2. San 
Francisco. Summer. 
4. A. DANTHONOIDES Trin. Glumes longer 
than the florets; panicle loose and open, the 
lowermost rays in threes, the upper in pairs or 
solitary.--2f. Oakland. Summer. 
19, Arrhenatherum Beauv. 
Spikelets 3-flowered: lower 6 ; middle 3; 
upper neutral. Glumes 2, concave, awnless; 
the upper larger than the lower. Palets of ¢ 
flower 2; lower dorsally aristate near the base; 
upper 2-carinate, awnless. Palets of & flower 
2; lower dorsally aristate near the apex, upper 
adnate to the caryopsis.—2{. Leaves flattened. 
Panicles with verticillate branches. Spikelets 
pedicillate. 
1. A. AVENACEUM Beauv.—Common. Sum- 
mer. 
European species, probably introduced as a 
fodder grass. 
20. Holcus L. 
Spikelets 2-flowered; flowers pedicillate ; 
lower %; upper 4. Glumes 2, navicular. 
Palets of the &% flower 2; lower navicular, awn- 
less; upper 2-carinate. Ovary sessile, pyri- 
form; caryopsis free. Palets of the 6 flower 
2; upper 2-carinate ; lower aristate near the 
