(311) 



2. F. TENELA Wild. Diandrous; panicle 

 contracted, spikelike, lower rays in unequal 

 pairs; glumes acute, the lower at least half as 

 long as the upper.— . San Francisco. Spring. 



3. F. MiCROSTACHYS Nutt. Monandrous ; 

 panicle contracted spike like ; branches not 

 appressed; glumes acute, the lower 1-nerved 

 and smaller than the 3-nerved upper; upper 

 glume almost as long as the lowest floret. — 0. 

 Common. Spring. 



4. F. oviNA L. Panicles loose, not spike- 

 like; rays mostly solitary; glumes about equal; 

 lower palet indistinctly nerved. — IC . Coast 

 Range. Summer. 



5. F. SCABRELLA Torr. Panicles loose, not 

 spikelike; lower rays distant in pairs; upper 

 glume somewhat longer than the lower and half 

 as long as the lowest floret; lower palet mem- 

 branaceous, distinctly 5-nerAed. — U- Oakland. 

 Summer. 



6. F. PAUCIFLORA Thunb. Panicles loose, 

 not spikelike; lower rays distant in pairs; 

 glumes narrow, the upper twice as large as the 

 lower; lower palet distinctly 5-nerved. — If. 

 San Francisco. Summer. 



32. Bromus L. Brome-Grass. 

 Spikelets 3- oo-flowered; flowers distichous; 

 glumes 2, unequal. Palets 2: lower rotund, 

 convex, sometimes aristate ; upper 2-carinate, 



