MANUAL OF THE GRASSES OF THE UNITED STATES 



333 



Figure 671— Agrost is 

 exigua. Panicle. X 

 1; glumes and floret, 

 X 5. (Type.) 



14. Agrostis exigua Thurb. (Fig. 671.) Annual; culms delicate, 

 3 to 10 cm tall, branching from the base; blades 5 to 20 mm long, 

 subin volute, scabrous; panicle half the length of the plant, finally 

 open; glumes 1.5 mm long, 

 scaberulous; lemma equaling 

 the glumes, scaberulous toward 

 the 2-toothed apex, bearing 

 below the tip a delicate bent 

 awn 4 times as long; palea 

 wanting, o — Known only 

 from ''foothills of the Sierras'' 

 (the type) and Howell Moun- 

 tain, Napa County, Calif. 



15. Agrostis elliottiana 

 Schult. (Fig. 672.) Annual; 

 culms slender, erect or decum- 

 bent at base, 10 to 40 cm tall; 

 blades flat, about 1 mm wide; 

 panicle finally diffuse, about 

 half the entire height of the 

 plant, the branches capillary, 

 fascicled, the spikelets toward the ends of the 

 branchlets, the whole panicle breaking away 

 at maturity; spike- 

 lets 1 .5 to 2 mm long; 

 glumes acute; lem- 

 ma 1 to 1.5 mm long, 

 minutely toothed, 

 the awn attached 

 below the tip, very 

 slender, flexuous, 

 delicately short- 

 pilose, 5 to 10 mm 

 long, sometimes 

 wanting ; palea want- 

 ing. © — Fields, 

 waste places, and 

 open ground, Mary- 

 land to Illinois, Mis- 

 souri, and Kansas, south to Georgia, Alabama, and eastern Texas; 

 introduced in Maine and Massachusetts (fig. 673); Yucatan. 



16. Agrostis halliiVasey. (Fig. 674.) Culms 

 erect, 60 to 90 cm tall, with creeping rhizomes; 

 ligule usually conspicuous, 2 to 7 mm long; 

 blades flat, 2 to 5 mm wide; panicle 10 to 15 

 cm long, narrow but loose, the branches verti- 

 cillate; glumes about 4 mm long; lemma awn- 

 less, 3 mm long, with a tuft of hairs at base 

 about half as long; palea wanting. Q| — Most- 

 ly in woods near the coast from Oregon to 



Santa Barbara, Calif. Agrostis hallii var. prixglei (Scribn.) 

 Hitch c. Branching, foliage stramineous; blades narrow, usually 

 involute; panicle narrow, compact. 91 — Near the coast in sand, 

 Mendocino County, Calif. 



Figure 670.— Agrostis henderso- 

 mi. Plmt, X 1; glumes and 2 

 views of floret, X 5. (Type.) 



Figure 672.— Agrostis elliottiana. 

 Panicle, X 1; glumes and floret, X 5. 

 (Johnson, Miss.) 



Figure 673.— Distribution of 

 Agrostis elliottiana. 



