38 



also is of rare oecnrrence, and is met with only in the liills s.i far ns ohserved. 



Secured on open hillsides, where it oocnrred iu small patches, grow inj; on a soil 



of disintegrated granite. Greeiitop, June 29 (3245). 

 Spartina gracilis Trin. (Si.EXDER Cord-GRASS, tig. 11).— A perennial from tough 



underground root-stocks, rather rigid and woody, hut not harsh; possibly of 



some value when young. It occurs as a scattering growth on sandy, alkaline 



soil on creek or pond hanks. Laramie River, .July 12 (3364); I'ine Bluffs, .Tuly 



() (3<J30) ; (Jranger, .July 30 (3885). 

 Schedonnardus panicnlatus Trolease (False C'RAB-onASS).— A worthless grass of 



spreading habit, leaves crowded at the base, the naked scabrous stems divari- 



FKi.O.—Agrogtinhnmilig; a, spikdct ; h, eniyity Flo. 10.— Piirplisli Rccdfrrass (Calamafirostis )iur- 

 KluninH; c, /, llorclH; </, jiiilct ; ('. (■ar.v(>i>si.H; piirasccnti): a, ciiijity ^'liiincs; /', Hort't; c, pro- 



ij. ajtcx of tlowi-iiii},' Kliiine. longaticm of llio r:i( liill:i. 



cately branched, rigid and brittle, .-it least when mature, 1) to 15 inches high. 

 Of rare occurrence, usually in broken ground, such as ilry ditches or plow 

 furrows. Tine Hlulls, .Inly (! (.'jr)42). 

 Bouteloua oligostachya 'I'orr. (IW.ack (;i:ama).— l^omewhat tufted or matted, )>ut 

 often a fairly uniform growth over sevei.il rods of ground in a place, the numer- 

 ous leaves are largely basal, tin; slender stems w hich Ik ar the one sided heads, 

 10 to 1« inches high. This is j)reemiiiently the grass of the jdains, occurring in 

 greater or less abundance every where on the arid pasture lands. It is of especial 



