55 



O. Lapponica, Trin. Mosquito. (1098.) 



C. coNFiNis, Nutt. Lovr ground, Twiu Lakes. (1090, 1100, 1101.) The 



seed is affected vrith an ergot {Cladiceps), wliich *' differs from Cladi- 



ceps pxoyurea in its smaller size and in its color. — C. H. Peck." 

 Eriocoma cuspid at a, Nutt. Denver. (1102.) 

 Stipa spartea, Trin. Twin Lakes. (1103.) 

 S. viRiDULA, Trin. Twin Lakes. (1104.) Arkansas Valley. (1105.) 



Mosquito. (1106.) Alpine woods. (1107,1108.) 

 S. MOJTGOLICA, Turcz. Wet ground, Twin Lakes ; rare. (1109.) 

 Aristida PURPUREA, Nutt., var. Fendleri. Denver. (1110.) 

 Spartina gracilis, Trin. Saguache. (1111.) 

 BouTELOUA HiRSUTA, Lag. Twin Lakes, Colorado. (1112.) 

 B. oliCtOSTACHYa, Torr. Twin Lakes. (1113.) Grant Creek, Colorado. 



(1114.) This is the gramma-grass of the plains and of Texas. 

 BuCHLOEDACTYLOiDESjEng. Summit. (1115.) The celebrated buffalo- 



Graphephorum flexuosum, Thurb. Fort Garland, Colorado. (1116.) 



KcELERiA CRiSTATA, Pers. Twiu Lakes. (1117, 1118,) 



Glycerta aquatica, Sm. Saguache Creek. (1119.) 



G. AiPtOiDES, Thurb. Saguache Creek. (1120.) 



G. nervata, Trin. Twin Lakes. (1121.) 



Catabrosa aquatica, Beau. Near Gray's Peak. (1122.) 



Brizophyrum spicatum, Hook. Saguache Creek. (1123, 1124.) 



The Poas of the Eocky Mountains are in much confusion as to names. 

 Some of those given herewith are open to doubt, but they indicate, 

 .apparentlv, good and distinct species. 

 POA PRATENSis, L. Subalpine ; apparently identical with our cultivated 



l)lant. Colorado. (1125.) 

 P. ALPiNA, L. Wet ground, Mosquito. (1126.) Also alpine streams, 

 South Park. (1127. These are mostly the var, minora Gaud & Hoppe, 

 with short, broad, and somewhat rigid leaves, culms 4 to 12 inches 



high, and rays single or in pairs. 

 P. EAXA, Haenk. A form with narrower leaves than the preceding; 

 panicle with more numeious and longer branches. South Park. 



(1128.) 

 P. c^siA, Sm.(?) A large form, 2 feet high, panicle 6 inches long, with 



long, capillary, scabrous branches (3 to 4 inches), erectish, or slightly 



spreading, and with sometimes a long subradical branch. Dry alpine 



woods, Twin Lakes. (1129.) 

 P. SEROTiNA, Ehrh. Panicle longer and narrower than the preceding. 



Dry ground, Twiu Lakes. (1130,) 



P. ]VEMORALis, L.(?) Culms tall (2 to 3 feet) and slender, smooth above, 

 somewhat scabrous below, with only 2 or 3 linear short leaves (6 

 inches) ; panicle 6 to 8 inches long, narrow : branches in fives, capil- 

 lary, and spreading. Scattering in alpine bogs, Twin Lakes. 



P. Wheeleri, n. sp. Radical leaves rigid, involute and cuspidate- 

 pointed, 5 to 10 inches long ; culms from running root-stocks like P. 

 hrevifolia^ MuhL, and having a panicle much like that, with capillary 

 branches in pairs ; flowers acute, not webbed. In timber, South Park. 



(113L) 

 P. FLEiuosA, Muhl. (?) Identical with Mr. Watson's ^N^o. 1316 m the col- 

 lection of King's Explorations, but diflerent from the eastern plant. 

 Culms from 2 to 3 feet high, pale green; panicle large, spreading; 

 rays long, in twos or threes ; flowers and glumes acute. Apex, Col. 



(1132.) 

 p/ , This is the plant described doubtfully as I\ aljnna, var., by 



