MANUAL OF THE GRASSES OF THE UNITED STATES 



427 



awn-point, the first 3-nerved, the second 5-nerved; lemma 9 mm 

 long, short-pilose, bearing 2 slender teeth at the apex, the callus 

 short; awn about 2.5 cm long, once- or indistinctly twice-geniculate, 

 scabrous. % — Rocky slopes, Sierra Nevada, from Lassen National 

 Forest to Tahoe National Forest, Calif. ; apparently rare. 



5. Stipa coronata Thurb. (Fig. 891.) Culms stout, 1 to 2 m tall, 

 as much as 6 mm thick at base, smooth or pubescent below the 

 nodes; sheaths smooth, the margin and throat 

 villous; ligule about 2 mm long, ciliate; blades 

 elongate, 4 to 6 mm wide, flat to subinvolute 

 with a slender involute point; panicle 30 to 40 

 cm long, contracted, erect, purplish; glumes 

 gradually acuminate, 3-nerved, the first about 2 

 cm long, the second 2 to 4 mm shorter; lemma 

 about 8 mm long, densely villous with long ap- 

 pressed hairs 3 to 4 mm long ; awn usually 4 to 

 5 cm long, scabrous, twice-geniculate, the first and second segments 

 about 1 cm long. % - — Open ground in the Coast Range, California, 

 from Monterey to Baja California. 



Stipa coronata var. depauperata (Jones) Hitchc. Culms 

 usually 30 to 50 cm tall; blades 10 to 20 cm long; panicle 10 to 15 cm 

 long, rather few-flowered, the spikelets commonly smaller than in 

 the species, the lemma 6 to 7 mm long, the awn about 2.5 cm long, 

 once-geniculate, the first segment twisted and scabrous-pubescent, 



Figure 888.— Distribution of 

 stipa speciosa. 



Figure 889 — 

 Stipa leuco- 

 tricha. Floret, 

 X 1; lemma, X 

 5. (Hitchcock 

 5138, Tex.) 



Figure 890.— 

 Stipa stilC- 

 manii. Flo- 

 ret, X 1; lem- 

 ma, X 5. 

 (Bolander, 

 Calif.) 



Figure 891.— Stipa 

 coronata. Floret, X 

 1; lemma, X 5. 

 (Orcutt 1068, Calif.) 



about 1 cm long, the second segment bent about horizontally. 01 — 

 Dry or rocky slopes, Utah and Nevada to Arizona ancl southern 

 California. Many intermediates occur between the variety and the 

 species. 



6. Stipa richardsoni Link. Richardson xeedlegrass. (Fig. 

 892.) Culms 50 to 100 cm tall; blades mostly basal, usually 15 to 25 



