GRASS FAMILY 



1-> -> 

 00 



13. Stipa vaseyi Scribn. 

 Sleepy-grass. Fig. 286. 



Stipa vasevi Scribn. U. S. Dept. Agr. Div. Agrost. Bull. 11: 



46. 1898. 

 Stipa viridula robiista Vasev, Contr. U. S. Nat. Herb. 1 : 



56. 1890. 



Culms 60-120 cm. high; sheaths somewhat hairy 

 at the throat ; blades elongate, involute ; panicle 

 about 30 cm. long, dense, the branches and branch- 

 lets numerous, many-flowered ; glumes narrow, 

 acuminate, scabrous, the first a little longer, rather 

 strongly 5-7-nerved, 10 mm. long ; lemma about 6 

 mm. long, appressed-pilose, the callus short, pilose : 

 awn twice-geniculate, about 2.5 cm. long, minutely 

 puberulent. 



Plains and open woods. Arid Transition Zone; from 

 Arizona to Colorado and south to northern jMe.xico. A 

 specimen from San Nicolas Island (Trask) is referred t-^ f'lis 

 species. April. Type locality: Texas. 



14. Stipa lemmoni (Vasey) Scribn. 

 Lemmon's Stipa. Fig. 287. 



Stipa pringlei lemmoni Vasey, Contr. U. S. Nat. Herb. 3: 55. 



1892. 

 Stipa lemmoni Scribn. U. S. Dept. Agr. Div. Agrost. Circ. 



30: 3. 1901. 



Culms 60-100 cm. tall, sometimes pubescent below 

 the nodes ; sheaths smooth ; ligule about 1 mm. long ; 

 blades usually flat, pubescent on upper surface ; pani- 

 cle narrow, the branches 2.5-5 cm. long, appressed ; 

 glumes nearly equal, rather broad, scarious, acumi- 

 nate, 3-5-nerved, 12 mm. long ; lemma 7 mm. long, 

 rather thinly appressed-pilose, the callus short ; awn 

 about 2.5 cm. long, twice-geniculate, appressed-pilose 

 to the second bend. 



Open woods. Arid Transition Zone; Washington, south in 

 the Coast Ranges and Sierra Nevada Mountains to Tehachapi. 

 June-July. Type locality: Plumas County, California. 



Stipa lemmoni jonesii Scribn. U. S. Dept. Agr. Div. Agrost. 

 Circ. 30: 4. 1901. Differs in the more slender, firm, involute 

 blades, and smaller spikelets; glumes about 8 mm. long; lemma 

 about 6 mm. long, the awn 2 cm. long, tending to be incurved, 

 the pubescence shorter. A scarcely distinct variety. Range 

 about the same as for .S". lemmoni. Type locality: Emigrant 

 Gap, California. 



15. Stipa lettermani A asey. 

 Letterman's Stipa. Fig. 288. 



Stipa lettermani Vasey, Bull. Torrey Club 13: 53. 1886. 



Stipa viridula lettermani Vasey, Contr. U. S. Nat. Herb. 

 3: 50. 1892. 



Stipa pinetornm Jones, Proc. Calif. Acad. II. 5: 724. 1895. 



Culms cespitose, slender, 30-40 cm. tall ; sheaths 

 smooth ; ligule very short ; blades crowded at base 

 of plant, short, slender, involute ; panicle narrow, 

 7-20 cm. long ; glumes narrow, acuminate. 3- 

 nerved. about 8 mm. long; lemma narrow, 5 mm. 

 long, pilose ; awn very slender, 1-1.5 cm. long, 

 nearh"- smooth, twice-geniculate, the first section 

 short, about 3 mm. long. 



Dry soil, Hudsonian and Alpine Zones; Oregon and 

 south in the Sierra Nevada and San Bernardino Mountains, 

 and on high peaks east to Colorado. July-Aug. Type 

 locality: Idaho. 



