(297 ) 



one side of the simple flattened branches, 

 which are digitately clustered at the top of the 

 culm. — 0. Common. Summer. 

 Probably introduced from Europe. 



2. P. AGROSTOIDES Spreng. Spikelets dis- 

 posed in panicles; panicle elongated, racemose. 

 7i . San Jose. Summer. 



3. P. CAPILLARE L. Panicle diftuse and 

 spreading; spikelets scattered, disposed in 

 panicles and pointed. — 0. San Francisco. 

 Summer. 



4. P. DICHOTOMUM L. Panicle diffuse and 

 spreading. Spikelets scattered, disposed in 

 panicles and obtuse. — 0. Marin County. 

 Summer. 



5. P. CRUSGALLi L. Spikelets crowded on 

 the secund, spikelike branches of the panicle. 

 0. Common. Summer. 



Introduced from Europe. 



2. Phleum L- Timothy. 



spikelets 1-flowered, y . Glumes 2; aristate; 

 the upper palet sometimes bearing at its base 

 the rudiment of a second flower. Leaves flat- 

 tened. Panicles spikelike. 



1. P. PRATENSE L. Awn shorter than its 

 glume. — U- Common. Summer. Native of 

 Europe. 



2. P. ALPINUM L. Awn about as long as its 

 glume. — U' San Francisco. Summer. 



ISA 



