254 



Fig. 550. Poa leckenbyi Seiibu. U. S. iJept. Agr., Div. Agros.. 

 Cir. 9 : 2. 1899. Sand Blue-grass. A pale green, tufted peren- 

 nial 6 to 8 dm. high, with long, narrow, flat leaves, somewhat 

 inflated, persistent basal sheaths and pale, rather narrow pan- 

 icles about 10 to 15 cm. long. .Spikelets obloug-lauceolate, 5- to 

 6-flowered, 9 to 11 mm. long, with subequal, 3-nerved, acute 

 ompty glumes (a) and scarious-margined flowering glumes (c), 

 which are pubescent on the back below, especially on the keel and 

 marginal nerves. Dry and very sandy soil, Washington. June. 



A valuable hay grass tor ' ery sandy soils. 



