348 



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



ma about 2.5 mm. long, awned from 

 about the middle, the awn twisted, 

 geniculate; anthers 0.8 to 1.8 mm. 

 long. 91 — Moist or wet places, 

 Pacific slope, Oregon and California; 

 infrequent. 



m. 



Figure 484. — Agrostis 

 ampla. Spikelet, and 

 two views of floret, X 

 5. (Type.) 



fMsfm 



Figure 485. — Agrostis 

 californica. Panicle, X 

 1 ; glumes and floret , X 

 5. (Anderson, Calif.) 



26. Agrostis californica Trin. (Fig. 

 485.) Culms tufted, usually rather 

 stout, erect or somewhat spreading at 

 base, 15 to 60 cm. tall; sheaths some- 

 times slightly scabrous; ligule trun- 

 cate, usually shorter than in A. ex- 

 arata, puberulent; blades flat, firm, 

 strongly nerved on the upper surface, 

 usually not more than 10 cm. long, 

 those of the culm comparatively 

 broad and short, often 3 to 5 cm. long 

 and 3 to 5 mm. wide, rarely as much 

 as 10 mm. wide; panicle dense, spike- 

 like, sometimes slightly interrupted, 

 mostly 2 to 10 cm. long and 5 to 15 

 mm. wide; spikelets about 3 mm. 

 long; glumes acute or acuminate, 

 prominently scabrous on the keel and 

 strongly scabrous on the sides; lemma 

 a little shorter than the glumes, awn- 

 less or with a straight awn from mi- 

 nute to somewhat exceeding the 

 glumes; palea one-fourth to one-third 

 as long as the lemma. % (A . densi- 

 flora Vasey.) — Sandy soil and cliffs 

 near the sea, Mendocino County to 

 Santa Cruz, Calif. This species has 

 been confused with A. exarata and 



with A. glomerata (Presl) Kunth of 

 Peru. 



27. Agrostis hooveri Swallen. (Fig. 

 486.) Culms densely tufted, very slen- 

 der, erect, 55 to 75 cm. tall; ligule 3 

 to 3.5 mm. long, lacerate, decurrent; 

 blades lax, mostly 10 to 15 cm. long, 

 not or scarcely more than 1 mm. 

 wide; panicle 7 to 17 cm. long, loose, 

 the branches ascending; spikelets 

 slightly purplish, 2 to 2.5 mm. long, 

 the second glume slightly shorter than 

 the first; lemma 2 mm. long, minutely 

 erose, 5-nerved, scaberulous, bearing 

 from near the base a bent awn 

 slightly exceeding the glumes; palea 

 obsolete. % — Dry, mostly sandy 

 open woodland, San Luis Obispo and 

 Santa Barbara Counties, Calif. 



Figure 486.- 



-Agrostis hooveri. Panicle X 1; glumes 

 and floret, X o. (Type.) 



28. Agrostis howellii Scribn. (Fig. 

 487.) Culms erect or decumbent at 

 base, 40 to 60 cm. tall; ligule 3 to 4 

 mm. long, lacerate; blades lax, as 

 much as 30 cm. long, 3 to 5 mm. wide; 

 panicle loose and open, 10 to 30 cm. 

 long, the branches flexuous; spikelets 

 pale, clustered toward the ends of the 

 branches; glumes acuminate, rather 

 narrow and firm, somewhat scabrous 

 on the keel, the first about 3.5 mm. 

 long, the second a little shorter; lem- 

 ma acute, 2.5 mm. long, 4-toothed, 

 faintly 3- to 5-nerved, bearing from 



