MANUAL OF THE GRASSES OF THE UNITED STATES 



109 



2.5 mm long, broad, glabrous, not webbed at base, the nerves faint. 

 21 Known only from Bear Valley, San Bernardino Mountains, 

 Calif. 



13. Poa curta Rydb. (Fig. 176.) Culms few in a loose tuft, 40 to 

 80 cm tall, rather lax; sheaths glabrous or minutely roughened; ligule 

 truncate, about 1 mm long; blades 3 to 6 mm wide; panicle open, 5 to 

 15 cm long, nodding, the rather distant branches spreading or reflexed, 



FIGURE 173. Poa confinis. Plant, X 1; floret, X 10. 

 (Piper 4910, Wash.) 



FIGURE 174. Poa rhizomata. Plant, X 1; 

 floret, X 10. (Type.) 



naked below; spikelets 5 to 10 mm long, 2- to 6-flowered; lemmas lan- 

 ceolate, subacute, slightly scaberulous, sometimes slightly pubescent 

 on the back at base, without a web, 4 to 5.5 mm long, rather strongly 

 nerved or intermediate nerves faint. 91 Moist shady places at 

 medium altitudes, western Wyoming, southern Idaho, and Utah 



14. Poa nervosa (Hook.) Vasey. WHEELER BLUEGRASS. (Fig. 

 177.) Culms erect, 30 to Q cm tall; sheaths glabrous or the lower 



