252 



Fig. 548. Poa pattersoni Yasey, Contrib. Nat. Herb. 1 : 275. 

 1893. Patterson's Blue-grass. — A low, densely tufted perennial 

 1 to 1.5 dm. high, with numerous basal leaves, 4 to 6 cm. long and 

 oblong, densely flowered panicles. Spikelets 2- to 3-flowered 4 to 6 

 mm. long with nearly equal, acute empty glumes nearly as long as 

 the floral ones (4 mm.) which are pubescent on the lateral nerves 

 and keel below the middle but not webbed. — High mountains of 

 Colorado. August. 



