(301 ) 
2. A. veRTIcILLATA Vill. Glumes nearly 
equal; upper palet nearly as long as the lower. 
2¢. San Francisco. Summer. 
3. A. EXxARATA 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.—2¢. San Fran- 
cisco. Summer. 
4, A. scaBra Willd. Glumes unequal, the 
lower longer, acute and scabrous; upper palet. 
very minute, sometimes 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.— 
©. 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.—2¢. Spikelets pe- 
dicillate, paniculate. 
