POACEAE. 



Stove Prairie Hill, Larimer Co.; mountains of Estes Park; Buena Vista; 

 Clear Creek ; near Chambers' Lake ; Como ; above Beaver Creek ; Happy 

 Hollow; Devil's Causeway; Graymont. 



2. Calamagrostis Langsdorfii (Link.) Trin. (D. Langsdorffii Trin.) In 

 wet meadows and open woods from Greenl. to Alaska, N. C. and Calif. 

 East of Laramie River, Larimer Co. 



3. Calamagrostis canadensis (Michx.) Beauv. (D. Canadensis Munro.) 

 In wet thickets and open woods; also in meadows from Lab. to B. C., N. C. 

 and Calif. Alt. 4000-11,000 ft. Fremont Co.; Middle Park; near Pagosa 

 Peak; Engelmann Canon; Red Mountain, south of Ouray; Alpine Tunnel; 

 Georgetown ; Rabbit-Ear Pass ; mountains and canons, west of Palmer Lake ; 

 Estes Park; vicinity of Pike's Peak; Gunnison; Buena Vista; Veta Pass; 

 vicinity of Ft. Collins ; Table Rock ; Barnes' Camp ; Elk Canon. 



C. canadensis acuminata Vasey is a variety approaching the preceding spe- 

 cies, in having larger flowers and more acuminate glumes. It has the same 

 range as the species. Alt. 9000-10,000 ft. Near Pagosa Peak; Anita Peak. 



4. Calamagrostis Scribneri Beal. In open marshes and wet meadows from 

 Alb. to B. C., Colo, and Wash. Alt. about 9000 ft. Near Pagosa Peak. 



5. Calamagrostis scopulorum M. E. Jones. Among rocks in Utah and Colo. 

 Alt. about 9000 ft. Near Pagosa Peak. 



6. Calamagrostis neglecta (Ehrh.) Gaertn. In open meadows from Lab. to 

 Alaska, Me. and Colo. Alt. 8000-9000 ft. Georgetown ; Ironton Park ; Twin 

 Lakes. 



7. Calamagrostis micrantha Kearney. In wet meadows from Ass. to Colo. 

 Alt. about 8500 ft. Steamboat Springs. 



8. Calamagrostis inexpansa A. Gray. In wet meadows and swamps from 

 N. Y. to Ida., N. J. and Colo. Alt. about 8000 ft Penn's Gulch. 



9. Calamagrostis hyperborea Lange. (D. stricta Am. auth. in part.) On 

 sandy shores and among rocks, from Greenl. to Alaska, Vt. and Calif. Alt. 

 4000-8500 ft. Clear Creek ; Hamor's Lake ; Georgetown ; Twin Lakes. 



The following varieties are recognized by Kearney : 



C. hyperborea stenodes Kearney, with narrow, strongly involute leaves, nar- 

 row panicle and smaller (3-3.5 mm. long), less scabrous empty glumes. In 

 swamps from Ass. to Mont, and Colo. Alamosa; South Park. 



C. hyperborea elongata Kearney, with broader, often flattened, leaves and 

 large, often interrupted, panicle. In wet meadows and swamps, especially in 

 the plain regions, from Ont. to B. C., Colo, and Calif. Veta Pass ; Penn's 

 Gulch; Gunnison; Fort Garland. 



C. hyperborea americana (Vasey) Kearney, with shorter, merely acute, 

 empty glumes and short dense inflorescence. In meadows and on prairies 

 from Vt. to B. C., Colo, and Ore. Breckenridge; Durango. 



31. CALAMOVILFA Hack. REED-GRASS, SAND-GRASS. 



i. Calamovilfa longifolia (Hook) Hack. (Calamagrostis longifolia Hook.) 

 On sandy shores and sand-hills, from Ont. and Man. to Ind. and Colo. Alt. 

 4000-5000 ft. Tobe Miller's ranch, near La Porte; vicinity of Fort Collins. 



