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sessile. — 21". with creeping rhizome, rigid, and 

 with involute leaves. 



1. S. STRICTA Koth. — Salt marshes. San 

 Francisco. Summer. 



14. Cynodon Kich. Bermuda Gra.ss. 



Spikelets 1-sided, sessile, 1-flowered, often 

 with rudiment of a superior Hower. Glumes 

 2, carinate, awnless, the upper embiacing the 

 lower. Palets 2; the lower carinate, acute. 

 Ovary sessile. — 21. Rhizome creeping. Leaves 

 flattened. Spikes in our species digitate. 



1. C. DACTYLON Pers. — San Jose. Summer. 



15. Danthonia T>C. 



Spikelets 2-x -flowered; rachis hairy. Flow- 

 ers distichous, the uppermost depauperate. 

 Glumes 2, awnless, somewhat lono:er than the 

 flower. Palets 2; upper 2-carinate; lower con- 

 cave, oo-nerved, 2-cleft, aristate. Ovary stipi- 

 tate; caryopsis compressed, free. — U- Turty. 

 Leaves flattened. Spikelets pedicellate, pan- 

 iculate. 



1 . D. Californica Bolander. —Contra Costa 

 hills. Summer. 



16. Avena L- Oat. 



Spikelets 3-flowered, the uppermost depau- 

 perate. Glumes 2, awnless. Palets 2; lower 

 2-cleft, aristate; upper 2-carinate, awnless. 



