252 



Fig. 548. Poa pattersoni Vasey, Conlrib. Nat. Herb. 1:275. 

 1893. Patterson's Blue-grass. A low, deusely tufted jierenuial 

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

 oblong, deusely llowered panicles. Spikelets 2- to 3-Howered 4 to 6 

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

 the doral ones (4 mm.) Avliich are pubescent on the lateral nerves 

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

 Colorado. August. 



