MANUAL OF THE GRASSES OF THE UNITED STATES 



345 



gravelly soil on an outcrop of diato- 

 maceous shale of the Monterey 

 series," west of Mount Vision, Point 

 Reyes Peninsula, Marin County, 

 Calif. 



18. Agrostis hallii Vasey. (Fig. 

 477.) 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 verticillate; glumes about 

 4 mm. long; lemma awnless, 3 mm. 

 long, with a tuft of hairs at base about 

 half as long; palea obsolete. 91 — 

 Mostly in woods near the coast from 

 Oregon to Santa Barbara, Calif. 

 Agrostis hallii var. pringlei 

 (Scribn.) Hitchc. Branching, foliage 

 stramineous; blades narrow, usually 

 involute; panicle narrow, compact. 

 % — Near the coast, in sand, Men- 

 docino County, Calif. 



Figure 477. — Agrostis hallii. Panicle, X 1; glumes 

 and floret, X 5. (Bioletti 110, Calif.) 



19. Agrostis lepida Hitchc. (Fig. 

 478.) Culms tufted, 30 to 40 cm. tall, 

 erect, with numerous short rhizomes; 

 ligule, at least on the innovations, as 

 much as 4 mm. long; leaves mostly 

 basal, the blades firm, erect, flat or 

 folded, the upper culm leaf below the 

 middle of the culm, the blade 3 cm. 

 long or less; panicle purple, 10 to 15 

 cm. long, the branches verticillate, 



Figure 478. — Agrostis lepida. Plant, X Yi\ glumes 

 and floret, X 5. (Type.) 



becoming divaricately spreading, the 

 lowermost 2 to 5 cm. long; glumes 3 

 mm. long, smooth or nearly so; lemma 

 2 mm. long; palea obsolete. % — 

 Meadows and open woods, Sequoia 

 National Park and San Bernardino 

 Mountains, Calif., at upper altitudes. 

 20. Agrostis pallens Trin. Dune 

 bent. (Fig. 479.) Culms erect, 20 to 

 40 cm. tall, with creeping rhizomes; 

 ligule rather firm, 2 to 3 mm. long; 

 blades flat or somewhat involute, 1 to 

 4 mm. wide; panicle contracted, al- 

 most spikelike, 5 to 10 cm. long; 

 glumes 2.5 to 3 mm. long; lemma a 

 little shorter than the glumes, awn- 

 less; palea obsolete. % — Sand 

 dunes along the coast, Washington to 

 central California. 



