290 MISC. PUBLICATION 200, U. S. DEPT. OF AGRICULTURE 



about as long as the florets ; lemmas smooth, the callus hairs short ; awn 



from near the base, from straight 

 and included in the glumes to weakly 

 geniculate and twice as long as the 

 spikelet. % — Bogs and wet 

 places, Greenland to Alaska, south 

 to New Jersey, West Virginia, Illi- 

 nois, North Dakota, New Mexico, 

 and California (fig. 577); arctic and 

 temperate regions of the Old World. 



Figure 572.— Deschampsia atropurpurea. Pan- 

 icle, X 1; glumes and floret, X 5. (Leiberg 

 2952, Idaho.) 



6. Deschampsia holciformis 



tufts with numerous basal 

 leaves, erect, relatively robust, 

 50 to 125 cm tall; blades 

 mostly folded, as much as 50 

 cm long, 2 to 4 mm wide, rather 

 firm; panicle 10 to 25 cm long, 

 condensed, many-flowered, the 



Figure 573.— Distribution of 

 Deschampsia atropurpurea. 



Variable in size, in width and tex- 

 ture of blades, in shape of the pan- 

 icle, and in length of awn. The 

 forms which have been segregated 

 as species are inconstant and the 

 characters used to distinguish them 

 are not correlated. Rarely with 

 proliferous spikelets. 

 Presl. (Fig. 578.) Culms in dense 



Figure 575.— Distribution of 

 Deschampsia flexuosa. 



branches appressed to sub- 

 flexuous-ascending, purplish to 

 brownish; spikelets 6 to 8 mm 

 long; glumes and lemmas sca- 

 berulous, the glumes about 

 equaling the spikelets or shorter, 

 3-nerved, the lateral nerves of 

 the first often obscure ; lemmas 

 awned from below the middle, the awns erect, exceeding the spike- 

 let, the callus hairs short. % — Marshes and sandy soil near the 

 coast, Vancouver Island to central California. 



Figure 574.— Deschampsia flexuosa. Panicle, X 1; 

 glumes and floret, X 5. (Hitchcock 16059, N. H.) 



