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37. Elyinus L. WILD-RYE. 

 Spikelets 1- oo-flowered, all $ ; florets dis- 

 tichous, the uppermost rudimentary. Glumes 

 2, equal, anterior. Palets 2, low or concave. 

 Ovary hirsute. 2. Leaves flattened. Spike- 

 lets representing a single spike. 



1. E. ARENARIUS L. G 1 u m e s acuminate, 

 shorter than the spikelet; lower palet carinate 

 towards the cuspidate tip; leaves pungent. 

 Cliff House. Summer. 



Introduced under the name " Esparto Grass," 

 to keep the sand dunes from moving. 



2. E. CONDENSATUS Presl. Glumes subu- 

 late-setaceous, shorter than the spikelet; lower 

 palet 5-nerved, mucronate, sometimes shortly 

 aristate; leaves ample, flat. San Francisco. 

 Summer. 



3. E. SIBIRICUS L. Glumes linear, 3-5- 

 nerved, acute or shortly aristate; lower palet 

 aristate, the awn longer than the palet. San 

 Francisco. Summer. 



4. E. SITANION Schult. Glumes very long, 

 sometimes 2-parted, ending in several very long 

 awns. San Kafael. Summer. 



38, Gymnostichum Schreb. BOTTLE-BRUSH GRASS. 

 Spikelets 1-4-flowered; florets remote, the 

 uppermost rudimentary. Glumes rudimentary, 

 often wanting. Palets 2, lower aristate, em- 



