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



Figuhe 479. — Agrostis pollens. Plant, X 1; glumes and floret, X 5. (Howell, Oreg.) 



22, Agrostis blasdalei Hitchc. (Fig. 

 481.) Culms 10 to 15 cm. tall, densely 

 tufted; blades narrow or filiform, 

 rigid, involute, 2 to 4 cm. long; pan- 

 icle strict, narrow, almost spikelike, 

 2 to 3 cm. long, the short branches 

 closely appressed; spikelets 2.5 to 3 

 mm. long; lemma about 1.8 mm. long, 

 awnless or with a very short awn just 

 above the middle; palea about 0.3 

 mm. long, nerveless. % — Cliffs 

 and dunes, Mendocino and Marin 

 Counties, Calif. Previously referred 

 to A. breviculmis Hitchc. of Peru. 



Figure 480. — Agrostis diegoe?isis. Plant, X 1; glumes 

 and floret, X 5. (Orcutt, Calif.) 



21. Agrostis diegoensis Vasey. 



Thingrass. (Fig. 480.) Culms erect, 

 as much as 1 m. tall with creeping 

 rhizomes; blades flat, lax, 2 to 6 mm. 

 wide; panicle narrow, open, 10 to 15 

 cm. long, the branches ascending, 

 rather stiff, some of them naked be- 

 low; spikelets about as in A. pattens, 

 awned or awnless. % — Meadows 

 and open woods at low and medium 

 altitudes, Montana and British Co- 

 lumbia to southern California and 

 Nevada. 



Figuhe 481. — Agrostis blasdalei. Panicle, X 1; glumes 

 and floret, X 5. (Type.) 



23. Agrostis variabilis Rydb. 

 Mountain bent. (Fig. 482.) Culms 

 10 to 25 cm. tall, densety tufted; 

 blades flat, mostly not more than 1 

 mm. wide; panicle, 2 to 6 cm. long, 

 the branches ascending; spikelets pur- 



