(310) 



8. P. DouGLASii Nees. Dioecious ; lower 

 palet acute; radical leaves setaceously convo- 

 lute. — U' San Francisco. Sand dunes. Sum- 

 mer. 



29. Eragrostis Beauv. 



Spikelets 2- ao-flowered. Glumes 2, obtuse. 

 Palets 2 ; upper palet persistont. 



1. E. POiEOiDES Beauv. — 0. San Francisco- 

 Spring. 



Probably introduced from Europe. 

 30. Briza L. Quaking-grass. 



Spikelets oo-flowered; flowers imbricate, dis- 

 tichous. Glumes 2, concave, rounded, ventri- 

 cose. Palets 2: lower rotund, concave, with 

 cordate base; upper much smaller, 2-carinate. 

 Caryopsis compressed. Leaves flattened. 

 Spikelets pedicellate, paniculate. 



1. B. MEDIA L. — 2;. Common. Summer. 

 31. Festuca L- Fesccte Grass. 



Spikelets 2- oo-flowered; flowers distichous. 

 Glumes 2, carinate, unequal. Palets 2; lower 

 not carinate, mucronate, sometimes aristate; 

 upper 2-carinate. Ovary sessile, smooth. 



1. F. MYURUS L. Monandrous; panicle con- 

 tracted, spikelike, narrow, rays appressed ; 

 lower glume minute; upper glume half as long 

 as the lowest floret. — . San Francisco. 

 Spring. 



