MANUAL OF THE GRASSES OF THE UNITED STATES 



343 



13. Agrostis exfgua Thurb. (Fig. 

 472.) Annual; culms delicate, 3 to 

 10 cm. tall, branching from the base; 

 blades 5 to 20 mm. long, subinvolute, 

 scabrous; panicle half the length of 

 the plant, finally open; glumes 1.5 

 mm. long, scaberulous; lemma equal- 

 ing the glumes, scaberulous toward 

 the 2-toothed apex, bearing below 

 the tip a delicate bent awn 4 times 

 as long; palea wanting. O — Foot- 

 hills and rocky plains, upper Sac- 

 ramento Valley, and muddy pond 

 border, Howell Mountain, Napa 

 County, Calif. 



7 V 



Figure 473. — Agrostis hendersonii. Plant, X 1; glumes 

 and 2 views of floret, X 5. (Type.) 



14. Agrostis hendersonii Hitchc 



cm. tall; ligule 2 to 3 mm. long; 

 blades flat or loosely involute, 1 to 

 3 cm. long, about 1 mm. wide; 

 ligule delicate, about 2 mm. long; 

 panicle condensed, about 2.5 cm. 

 long, purplish; spikelets short-pedi- 



Figure 474. — Agrostis 

 kennedyana. Panicle, 

 X 1 ; glumes and floret, 

 X 5. (Type collec- 

 tion.) 



Figure 475. — Agrostis 

 microphylla. Panicle, 

 X 1 : glumes and floret, 

 X 5. (Bolander 1512, 

 Calif.) 



celed, 5 to 6 mm. long; glumes sub- 

 equal, setaceous- tipped; lemma about 

 3 mm. long, finely 2-toothed, the 

 delicate awns of the teeth readily 

 breaking off, awned from the middle, 

 the awn about 1 cm. long, geniculate, 

 the callus pubescent; palea obsolete. 

 O — Wet ground, known only from 

 Sams Valley, near Gold Hill, Jackson 

 County, Oreg., and Shasta County, 

 Calif. 



15. Agrostis kennedyana Beetle. 

 (Fig. 474.) Annual; culms very slen- 

 der, 15 to 23 cm. tall; ligule about 2 

 mm. long; blades flat or loosely in- 

 volute, 2 to 4 cm. long, 1 to 1.5 mm. 



(Fig. 473.) Annual; culms about 10 wide, or the basal blades slightly 



