slightly longer than the florets, more or less purplish-tinged; lemmas 2-3 mm. 

 long, smooth and shining, somewhat indurate, the awns straight, to twice as long 

 as the glumes. 



Moist or wet soil in meadows, along streams, on open or wooded slopes, in 

 Ariz. (Mohave, Graham and Pima cos.); Alas, to Wyo., s. to Ariz., Calif, and 

 Mex.; Chile. 



3. Deschampsia caespitosa (L.) Beauv. Tufted hair grass. Fig. 103. 



Perennial; culms densely tufted, erect, 5-15 dm. tall (alpine forms reduced); 

 leaves mostly basal, flat or folded, 1.5-4 mm. wide, short or often elongate; 

 panicle open, nodding (condensed, with short, usually appressed branches in 

 Deschampsia caespitosa subsp. holciformis) , 10-25 cm. long, capillary, the 

 scabrous branches spikelet-bearing toward the ends; spikelets 3.5-7 mm. long, 

 green or purple-tinged, the florets distant, the rachilla joint one half as long as the 

 lower floret; glumes acute, glabrous or minutely scabrous; lemmas smooth, the 

 awns from near the base, from straight and included to slightly bent and twice 

 as long as the spikelet. 



Bogs, wet mt. meadows, edges of marshes and in shallow water, in N. M. 

 (Otero and Taos cos.) and Ariz. (Apache, Coconino and Cochise cos.); Greenl. 

 to Alas., s. to N. C, 111., N. D., N. M., Ariz, and Calif.; s. Arg. and Chile; also 

 the Old World. 



24. Holcus L. 



About 8 species in the Canaries, Eurasia and North Africa and South Africa. 



1. Holcus lanatus L. Velvet grass. Fig. 104. 



Plant grayish, velvety-pubescent; culms erect, 3-10 dm. tall, rarely taller; 

 blades 4-8 mm. wide; panicles 8-15 cm. long, contracted, pale, purplish-tinged; 

 spikelets 4 mm. long; glumes villous, hirsute on the nerves, the second broader 

 than the first, 3-nerved; lemmas smooth and shining, the awn of the second hook- 

 like. 



Open ground, wet meadows and wet or moist places, in Okla. (Delaware Co.) 

 and Ariz. (Coconino Co.); Me. to Okla. and Colo. s. to Ga. and La.: common 

 on the Pac. coast, B.C. and Mont, to Ariz, and Calif.; introd. from Eur., wide- 

 spread in Can. and U.S. 



25. Danthonia Lam. & DC. Oatgrass 

 About 10 species in warm regions. 

 1. Danthonia intermedia Vasey. Timber oatgrass. 



Culms 1-5 dm. tall; sheaths glabrous (the lower rather pilose) with long hairs 

 in the throat; blades subinvolute or those of the culm flat, glabrous or sparsely 

 pilose; panicle purplish, narrow, few-flowered, 2-5 cm. long, the branches 

 appressed, bearing a single spikelet; glumes about 15 mm. long; lemmas 7-8 mm. 

 long, appressed-pilose along the margin below and on the callus, the summit 

 scaberulous, the acuminate teeth aristate-tipped; terminal segment of awn 5-8 mm. 

 long; palea narrowed above, notched at the apex. 



Wet meadows and bogs in N. M. (Pecos National Forest) and Ariz. (Apache, 

 Coconino and Graham cos.); Nfld. and Que. to Alas., s. to n. Mich., N. M., Ariz, 

 and Calif. 



26. Calamagrostis Adans. Reed-grass 



Perennial usually moderately tall grasses, mostly with creeping rhizomes, with 

 small spikelets in open or usually narrow sometimes spikelike panicles; spikelets 

 1 -flowered, the rachilla disarticulating above the glumes, prolonged behind the 



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