380 BOTANY. 



Valley and in the East Humboldt Mountains, Nevada ; 5-7,000 feet altitude ; 

 July. (1,293.) Quite variable in the length of the glumes, (8-20",) palet, 

 (4-10",) and awn, (2^-8'.) Leaves and nodes never pubescent, lower palet 

 rather spreading-pilose, the awn twice geniculate, usually pubescent toward 

 the base. The species seems not to extend southward. In Texas and New 

 Mexico S. Neesiana, Trin., {S. setigera, Presl., and probably also S. ciliata, 

 Scheele, and 8. leucotricha, Trin.,) takes its place, a rather smaller grass with 

 more slender culms, pubescent upon the leaves and nodes, and the palet fim- 

 briate-crowned ; collected by Wright, and 980 Fendler, (but near S. spartea,) 

 and also occurring in California. 



Stipa comata, Trin. Steud. Gram. 130. It is not easy to find constant 

 characters to distinguish this species from S. spartea, other than the always 

 elongated (6-8') once-geniculate awn, glabrous toward the base or with a 

 single pubescent line, very slender and much curled and twisted ; panicle 

 always sheathed at basCj the branchlets with but 1-2 spikelets ; palet 5-8" 

 long, the hairs more silky and appressed. On the Saskatchewan, and on the 

 Upper Missouri from Dakota to Northern Idaho, and southward. Mono Lake, 

 California, (Bolander.) Foot-hills of the Truckee Range, Western Nevada, 

 and on Stansbury Island in Salt Lake ; 4-5,000 feet altitude ; May. (1,294.) 



Stipa vieidula, Trin. Steud. Oram. 129. Culms stout, strict, and 

 with the narrow sheaths scabrous or sometimes glabrate, 1-3J° high, the 

 nodes naked; leaves elongated, mostly narrow and involute, 1-3" broad, 

 scabrous ; panicle narrow, contracted, 3-10' long, the erect branches 2-3 to- 

 gether, flowering from the base or some of them naked below ; glumes nearly 

 equal, 3-4J" long, narrowly acuminate ; lower palea 2^-3" long, short-pilose 

 at the obtusish base, appressed-pubescent above, and with a pilose crown at 

 the apex ; awn about 1' long, twisted and geniculate, minutely scabrous. — 

 From the Saskatchewan to Arkansas, Colorado and New Mexico ; California, 

 (Bolander.) 849 Fendler and 349. Grregg are a very stout form with large 

 and dense panicles. East and West Humboldt Mountains, Nevada; 8,000 

 feet altitude ; August. (1,295.) 



Stipa occidentalis, Thurb., Ms. in Bol. Coll. Culms 1-2° high, slender, 

 with the narrow sheaths somewhat scabrous ; nodes naked ; leaves very nar- 

 row, flat or mostly involute, rough on the margin ; panicle often sheathed at 

 base, contracted, few-flowered, 2.-6' long, the branches in pairs, 2-4-flowered ; 

 glumes 5" long, purplish, a little unequal, acuminate ; lower palet 3J" long, 



