326 



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



— Mountain slopes, Washington to 

 California; apparently rare. 

 23. Calamagrostis cinnoides 



(Muhl.) Barton. (Fig. 445.) Glau- 

 cous; culms rather stout, erect, 80 

 to 150 cm. tall, with slender rhizomes 

 readily broken off; sheaths and blades 

 very scabrous, sometimes sparsely 

 hirsute, the blades flat, 5 to 10 mm. 

 wide; panicle erect, dense, more or 

 less lobed (somewhat open at an- 

 thesis), 8 to 20 cm. long, purple- 



scabrous, acute or acuminate, not 

 awn-pointed; lemma about as long 

 as the glumes, minutely pilose, the 

 awn attached above the middle, 

 straight, about as long as the lemma, 

 the callus hairs about two-thirds as 

 long; rachilla rather sparsely long- 

 pilose, especially on the upper part. 

 % — Moist soil in gulches, Mon- 

 tana, Wyoming (Wild Cat Peak), 

 Colorado, Utah, New Mexico, and 

 Arizona. 



tinged; glumes 6 to 7 mm. long, 

 scabrous, long-acuminate or awn- 

 pointed; lemma firm, acuminate, sca- 

 brous, shorter than the glumes, the 

 awn attached about one-fourth below 

 the tip, not much exceeding the 

 lemma, the callus hairs copious, 

 about two-thirds as long; rachilla 

 about 1 mm. long, glabrous below, 

 with a brush of long white hairs at 

 the tip about equaling the lemma. 

 % — Bogs and moist ground, Maine 

 to New York, south to Alabama 

 and Louisiana. 



24. Calamagrostis scopulorum 



Jones. (Fig. 446.) Pale, glaucous; 

 culms erect, 50 to 80 cm. tall, with 

 short rhizomes; blades elongate, flat, 

 scabrous, 3 to 7 mm. wide; panicle 

 pale to purplish, contracted, some- 

 times spikelike, 8 to 15 cm. long; 

 glumes 4 to 6 mm. long, somewhat 



Figure 445. — Calamagrostis cinnoides. 

 Panicle, X 1 ; glumes and floret, X 

 10. (Chase 7518, Md.) 



Figure 446. — Calamagrostis scopulorum. Panicle, X 1; 

 glumes and floret, X 10. (Jones 1145, Utah.) 



25. Calamagrostis inexpansa A. 



Gray. Northern reedgrass. (Fig. 

 447.) Culms tufted, 40 to 120 cm. 

 tall, with rather slender rhizomes, 

 often scabrous below the panicle; 

 sheaths smooth, or somewhat sca- 

 brous, the basal ones numerous, 



