HOW TO KNOW THE GRASSES 



9a. Awn short, concealed within the glumes, or absent. Fig. 183. 



Tiisetuzn woUii Vasey 



Perennial; tufted or sometimes with short 

 rhizomes; culms 50 — 100 cm. tall; leaf blades 

 flat, 2 — 4 mm. wide, scabrous on the upper 

 surface; panicles dense, cylindrical, yellowish. 

 An important forage grass in moist mountain 

 meadows at mid-altitudes in the western 

 mountains. July — September. 



Figure 183 



9b. Awn protruding from the glumes, bent and twisted. Fig. 184. 



SPIKE TRISETUM Trisetum spicatum (L.) Richt. 



Perennial; tufted; culms 15 — 50 cm. 

 tall; foliage smooth or finely hairy; 

 panicles spikelike, dense, shaggy 

 with many protruding awns, purplish 

 or golden. An important forage 

 grass at high altitudes, on slopes and 

 in mountain meadows in the western 

 mountains. The plants furnish good 

 forage throughout the growing sea- 

 son, especially for cattle and horses. 

 June — August. 



Figure 184 



10a. Awn attached between 2 teeth at the tip of the lemma; spikelets 

 with 3 or more florets 11 



98 



