MANUAL OF THE GKASSES OF THE UNITED STATES 



289 



Figure 569.— Distribution of 

 Deschampsia danthonioides. 



panicle loose, open, 5 to 10 cm long, the few capillary drooping 

 branches naked below; spikelets mostly purplish, broad; glumes about 

 5 mm long, broad, the second 3-nerved, exceeding the florets; lemmas 

 scabrous, about 25 mm long, the callus hairs one-third to half aalong, 



the awn of the first 



straight, included, of the 



second, geniculate, exsert- 



ed. 21 — Woods and 



wet meadows, Newfound- 

 land and Labrador to 



Alaska, south to the 



White Mountains of New 



Hampshire; Colorado, and 



Oregon (fig. 573) ; northern 



Eurasia. 



4. Deschampsia fiexuo- 



sa (L.) Trin. Crinkled 



hairgrass. (Fig. 574.) 



Culms densely tufted, 



erect, slender, 30 to 80 cm 



tall; leaves mostly in a 



basal tuft, numerous, the 



sheaths scabrous, the 



blades involute, slender or 



setaceous, flexuous; pan- 

 icle loose, open, nodding, 



5 to 12 cm long, the capil- 

 lary branches naked below, 



the branchlets spikelet- 



bearing toward the ends; 



spikelets 4 to 5 mm long, 



purplish or bronze, the flo- 

 rets approximate; glumes 



1-nerved, acute, shorter 



than the florets; lemmas 



scabrous, the callus hairs 



about 1 mm long, the awn 

 attached near the base, geniculate, twisted, 5 to 7 mm long. % — 

 Dry or rocky woods, slopes, and open ground, Greenland to 

 Alaska, south to North Carolina, Michigan, and Wisconsin; Okla- 

 homa (Le Flore County) (fig. 575); Eurasia. A form with yellow- 

 striped foliage (called by gardeners Aira joliis 

 variegatis) is occasionally grown for ornament. 

 5. Deschampsia caespitosa (L.) Beauv. 

 Tufted hairgrass. (Fig. 576.) Culms in dense 

 tufts, leafy at base, erect, 60 to 1 20 cm tall ; sheaths 

 smooth ; blades 1 .5 to 4 mm wide, often elongate, 

 rather firm, flat or folded, scabrous above; pan- 

 icle loose, open, nodding, 10 to 25 cm long, the 

 capillary scabrous branches and branchlets spike- 

 let-bearing toward the ends; spikelets 4 to 5 mm long, pale or purple- 

 tinged, the florets distant, the rachilla joint half the length of the 

 lower floret; glumes 1-nerved or the second obscurely 3-nerved, acute, 



Figure 568.— Deschampsia 

 danthonioides. Panicle, X 

 1; glumes and floret, X 5. 

 (Parish 3300, Calif.) 



Figure 

 gata. 



570. — Deschampsia elon- 

 Paniele, X 1; glumes and 



floret, X 5. (S.wallen 780, Calif.) 



Figure 571.— Distribution of 

 Deschampsia elongata. 



