44 POACEAE. 



CrccpinR rootstock often present ; panicle narrow and usually lax ; 

 tlowcrins glumes if at all purplish only slightly so at the very tip; 

 leaves flat. 46. P. Sheldotiii. 



1. Poa annua L. In waste and cultivated places, from Lab. and B. C. to 

 Ga. and Calif.; also in Mex. Naturalized from Europe. — Alt. up to 9000 ft. 

 — Ilanior's Lake, north of Duraiigo. 



2. Poa Bigelovii V. & S. From Te.x. to Colo, and Calif. — Alt. up to 6000 

 ft. — "Colorado," locality not given; Colorado Springs; along Purgatoire 

 River, near Trinidad. 



3. Poa pratensis L. In meadows from Lab. and Alaska to Fla. and Calif. ; 

 also native of Europe and Asia. — Alt. 4000-11,500 ft. — Mountains northeast of 

 Dolores; Fort Collins; Marshall Pass; Manitou ; Villa Grove; Beaver Creek; 

 Dead Lake; Crystal Park; mountains near Pagosa Peak; vicinity of Ouray; 

 Cameron Canon; Pagosa Springs; Happy Hollow; Cucharas Valley, near La 

 Veta ; Sangre de Cristo Creek ; La Plata Caiion ; Parrott City ; Pass Creek ; 

 Cascade Canon; Quimby; along Conejos River, north of Antonito. 



4. Poa cenisia All. (Poa Hexiiosa Wahl.) In wet places in arctic or alpine 

 regions from Greenl. to Alaska ; also in Colo. — Alt. about 10,500 ft. — Moun- 

 tains near Pagosa Peak. 



5. Poa arctica R. Br. In wet places in arctic or alpine regions along the 

 arctic coast and Alaska, the Canadian Rockies and Colo. — Alt. 11,000-14,000 

 ft. — Gray's Peak; Mt. Bartlett; Saddle, Pike's Peak; mountains near Pagosa 

 Peak ; Chambers' Lake. 



6. Poa callichroa Rydb. On alpine peaks of Colo. — Alt. about 11.500 ft. — 

 Dead Lake ; Campton's Ranch. 



7. Poa pudica Rydb. {P. arctica Scribn. ; in part.) In wet places in alpine 

 or subalpine Colo. — Alt. 11,000-13.000 ft.— High mountains about Empire; 

 near Pagosa Peak ; Stephen's Mine. 



8. Poa reflexa V. & S. In wet meadows from Mont, and Ore. to N. M. — 

 Alt. 8000-13,000 ft. — Twin Lakes; Seven Lakes; Silver Plume; high moun- 

 tains about Empire; Cameron Pass; Marshall Pass; near Teller, North Park; 

 tapper La Plata River; near Pagosa Peak; Democrat Mountain; headwaters 

 of Sangre de Cristo Creek; Pass Creek; near Ironton, San Juan Co.; Cham- 

 bers' Lake: Ute Pass road; Four-Mile Hill. 



9. Poa leptocoma Bong. In wet meadows from Mont, and Alaska to Colo, 

 and Calif.— Alt. 8500-12,500 ft.— Villa Grove; Pike's Peak Valley; chaparrel- 

 covered hills southeast of Ouray: near Pagosa Peak; Columbine; Chicken 

 Creek; Upper La Plata River; Ruby; Beaver Creek; Cameron Pass; Little 

 Kate Mine, La Plata Mountains. 



10. Poa alpicola Nash. {Poa laxa Thurb.) In wet places on the alpine 

 peaks of Colo, and Utah; perhaps also Calif.— Alt. 11,500-13,000 ft.— Long's 

 Peak; headwaters of Clear Creek and alpine ridges east of Middle Park; 

 Bottomless Pit, near Pike's Peak; top of Mt. Hayden; Estes Park; Gray's 

 Peak. 



11. Poa platyphylla Nash & Rydb. {Poa occidcntalis Vasey.) Along 

 mountain streams of Colo, and N. M.— Alt. 7000-10,500 ft.— Near Pagosa 

 Peak; Veta Pass; Cucharas River, near La Veta; Ojo; Wahatoya Canon; 

 headwaters of Sangre de Cristo Creek; Bob Creek, west of Mt. Hesperus; 



