(301) 



2. A. VERTICILLATA Vill. G 1 u m e s nearly 

 equal; upper palet nearly as long as the lower. 

 11 . San Francisco. Summer. 



3. A. EXAEATA Trin. Glumes nearly equal; 

 upper palet minute, about the length of the 

 ovary ; lower palet 5-nerved and marked on the 

 back by a longitudinal furrow. It . San Fran- 

 cisco. Summer. 



4. A. SCABBA Willd. Glumes unequal, the 

 lower longer, acute and scabrous; upper palet 

 very minute, sometimes 0. 0. San Francisc- 

 co. Spring. 



10, Gastridium Pal. 



Spikelets 1-flowered. Glumes 2, ventricose 

 at the base, much larger than the flower and 

 closed. Palets 2; the inferior sometimes aris- 

 tate, embracing the superior 2-carinate one. 

 0. Leaves flattened. Panicles contracted, 

 spikelike. 



1. G. AUSTRALE Beauv. San Francisco. 

 Spring. 



11. Stipa L- FEATHER-GRASS. 



Spikelets 1-flowered, flowers stipitate. 

 Glumes 2,membranaceous, larger than the flow- 

 er. Palets 2, involute, superior shorter, 2- 

 nerved; inferior aristate, with a simple twisted 

 awn. Ovary stipitate; caryopsis terete, and 

 closely wrapt in the palets. H Spikelets pe- 

 dicillate, paniculate. 



