MANUAL OF THE GRASSES OF THE UNITED STATES 



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44, Poa stenantha Trin. (Fig. 230.) Culms tufted, 30 to 50 cm 

 tall; ligule prominent, as much as 5 mm long; blades flat or loosely 

 involute, rather lax, mostly basal, 1 to 2 mm wide, the uppermost 

 culm leaf below the middle of the culm; panicle nodding, 5 to 15 cm 

 long, the branches in twos or threes, arcuate-drooping, naked below, 

 with a few spikelets at the ends; spikelets 3- to 5-flowered, 6 to 8 mm 

 long; lemmas about 5 mm long, pubescent on the lower part of keel 



Figure 227.— Distribution of Poa 

 autumnalis. 



Figure 228.— Poa olpina. Panicle, X V, 

 floret, X 10. (Eggleston 11824, Colo.) 



Figure 226.— Poa autumnalis. Panicle, 

 floret, X 10. (Curtiss 6787, Ga.) 



Figure 229.— Distribution of Poa alpina. 



and marginal nerves, sparsely pubescent on the internerves below. 

 % — Moist open ground, Alaska, Alberta, and British Columbia, 

 extending into Montana, Colorado (White River Forest), Idaho, 

 Washington (Nooksack River), and Oregon (Crater Lake) (fig. 231). 

 45. Poa glauca Vahl. (Fig. 232.) Plants glaucous, in close or 

 loose tufts; culms erect, stiff, 10 to 30 cm tall, sometimes taller, naked 

 above, the uppermost leaf usually much below the middle; ligule of 

 uppermost leaf about 2 mm long; blades mostly basal, 3 to 5 cm long, 

 1 to 2 mm wide; panicle 3 to 7 cm long, narrow, rather compact, the 



55974°— 35 9 



