44 POACEAE. 



Creeping rootstock often present ; panicle narrow and usually lax ; 

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

 leaves flat. 46. P. Sheldonii. 



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. 

 Hamor's Lake, north of Durango. 



2. Poa Bigelovii V. & S. From Tex. 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 Canon; Parrott City; Pass Creek; 

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



4. Poa cenisia All. (Poa flcxuosa 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; 

 Upper 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 occidentalis 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; 



