MANUAL OF THE GRASSES OF THE UNITED STATES 



315 



Blades involute or, if flat, rigid and becoming involute. 



Blades broad and short, as much as 5 mm. wide, nearly smooth. 



28. C. CRASSIGLUMIS. 



Blades elongate, smooth or scabrous. 



Blades firm, scabrous, rather rigid; ligule 4 to 6 mm. long; panicle firm, dense. 



25. C. INEXPANSA. 

 Blades relatively soft, smooth beneath; ligule 1 to 3 cm. long. 

 Spikelets 3.9 to 4.2 mm. long; panicle 18 to 22 cm. long. 



26. C. CALIFORNICA. 



Spikelets 3 to 3.5 mm. long; panicle 5 to 15 cm. long.... 27. C. neglect a. 



Figure 424. — Calamagrostis howellii. Panicle, X 1 ; glumes and floret, X 10. (Chase 4846, Oreg.) 



1. Calamagrostis bolanderi Thurb. 

 (Fig. 423.) Culms erect, 1 to 1.5 m. 

 tall, with slender rhizomes; sheaths 

 scabrous; ligule 4 to 5 mm. long; 

 blades flat, 5 to 9 mm. wide, scat- 

 tered, nearly smooth; panicle open, 

 10 to 20 cm. long, the branches 

 verticillate, spreading, naked below, 

 the longer 5 to 10 cm. long; glumes 

 3 to 4 mm. long, purple, scabrous, 

 acute; lemma very scabrous, about 



as long as the glumes, the awn from 

 near the base, geniculate, exserted, 

 about 2 mm. long above the bend, 

 the callus hairs short; rachilla pilose, 

 1 to 2 mm. long. % — Bogs and 

 moist ground, prairie or open woods, 

 near the coast, Mendocino and Hum- 

 boldt Counties, Calif. 



2. Calamagrostis howellii Vasey. 

 (Fig. 424.) Culms densely tufted, 

 rather slender, ascending, 30 to 60 



