MANUAL OF THE GRASSES OF THE UNITED STATES 



131 



-Poa uni- 



W 



Figure 242 

 lateralis. Panicle, X 

 1; floret, X 10. (Chase 

 5653, Calif.) 



Figuke 243. — Poa epitis 

 Panicle, X 1; floret, X 10 

 (Type.) 



few in a tuft, 20 to 40 cm tall; ligule about 3 mm long; blades of 

 the culm about 3, flat, 3 to 6 cm long, 2 to 3 mm 



wide, of the innovations nar- 

 row, longer and usually folded 

 or involute; panicle usually 

 condensed, ovoid, 2 to 6 cm 

 long, long-exserted, usually 

 purple, the lower branches 

 naked below, ascending or 

 appressed ; spikelets 3-flow- 

 ered, about 5 mm long; lem- 

 mas 4 to 5 or even 6 mm long, 

 glabrous or minutely sca- 

 brous. 91 — Mountain mead- 

 ows, mostly above timber 

 line, Alberta to British Co- 

 lumbia, south to Colorado, 

 Utah, Nevada, and Califor- 

 nia (fig. 244). 



53. Poa vaseyochloa Scribn. 

 (Fig. 245.) In small dense 

 soft lax tufts; culms erect, 10 

 to 20 cm tall; ligule acute, 

 about 3 mm long; blades lax, mostly folded or involute, in a basal 

 tuft, mostly less than 5 cm long, with one or 

 two short ones on the culm, narrow or filiform; 

 panicle ovate, 2 to 4 cm long, few-flowered, 

 open, the slender branches spreading, bearing 

 1 or 2 spikelets; spikelets purple, 3- to 6- 

 flowered; glumes 2 to 3 mm long, rather broad; 

 lemmas smooth or minutely scabrous, 3 mm 



long. % — Rocky 

 slopes, Cascade Moun- 

 tains of Washington 

 and Oregon in the vi- 

 cinity of Columbia 

 River, and the Wallowa 

 Mountains of Oregon. 



54. Poa pringlei 

 Scribn. (Fig. 246.) 

 Densely tufted; culms 10 to 20 cm tall; lower 

 sheaths loose, papery; blades mostly basal, 

 involute, mostly 2 to 5 cm long, sometimes 

 longer, glabrous on the exposed surface, pu- 

 berulent on inner surface; panicle narrow, 

 condensed, usually pale or silvery, few- to 

 several-flowered, 1 to 5 cm long; spikelets 3- 

 to 5-flowered, 6 to 8 mm long; glumes equal, broad, 4 to 5 or rarely 

 7 mm long; lemmas 5 to 6, rarely 8 mm long, smooth or scabrous. 



Figuee 244.— Distribution of 

 Poa epilis. 



Figure 245.— Poa vaseyo- 

 chloa. Plant, X 1; floret, X 

 10. (Type.) 



