MANUAL OF THE GRASSES OF THE UNITED STATES 



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5. Calamagrostis foliosa Kearney. 

 (Fig. 427.) Culms tufted, erect, 30 to 

 60 cm. tall; leaves numerous, crowded 

 toward the base, the sheaths overlap- 

 ping, the blades involute, firm, 

 smooth, nearly as long as the culm; 

 panicle pale, dense, spikelike, 5 to 12 

 cm. long; glumes about 1 cm. long, 

 acuminate; lemma 5 to 7 mm. long, 

 acuminate, the apex with 4 setaceous 

 teeth, the awn from near base, genic- 

 ulate, about 8 mm. long above the 

 bend, the callus hairs numerous, 3 



Figure 427. — Calamagrostis foliosa. Panicle, X 

 glumes and floret, X 10. (Davy 6602, Calif.) 



1; 



Figure 426. — Calamagrostis tweedyi. Panicle, X 1 ; 

 glumes and floret, X 10. (Vasey, Wash.) 



mm. long; rachilla pilose, nearly as 

 long as lemma. % — Humboldt 

 and Mendocino Counties, Calif. 

 6. Calamagrostis purpurascens R. 



Br. Purple reedgrass. (Fig. 428.) 

 Culms tufted, sometimes with short 

 rhizomes, erect, 40 to 60 cm. or even 

 100 cm. tall; sheaths usually scabrous, 

 the old sheaths persistent and fibrous; 

 blades 2 to 4 mm. wide, flat or more 

 or less involute, rather thick, sca- 

 brous; panicle dense, usually pinkish 

 or purplish, spikelike, 5 to 12 cm. 

 long, rarely longer; glumes 6 to 8 mm. 

 long, scabrous; lemma nearly as long 

 as glumes, the apex with 4 setaceous 

 teeth, the awn from near base, finally 

 geniculate, exserted about 2 mm.; 

 hairs of callus and rachilla about one- 



