POACEAE. 57 



ows and among bushes from Mich, to Alb., B. C, Colo, and Calif. — Alt. 

 7000-11,000 ft. — Mountains near Pagosa Peak; Hamor's Lake, north of 

 Durango; about Ouray; Keblar Pass; Villa Grove; Horsetooth Gulch; Ute 

 Pass road ; mountains above Cameron Pass ; edge of aspen grove, western 

 Gunnison Co. 



5. Elymus Saundersii Vasey. On mountains in Colorado. — Exact locality 

 not given. 



6. Elymus Macounii Vasey. In meadows from Man. and Sask. to Alb., 

 N. Mex. and Utah. — Alt. 4000-7000 ft. — Denver; Durango; Fort Collins; 

 Gunnison; Manitou. 



7. Elymus condensatus Presl. On hills and in dryer valleys 'from Alb. 

 and B. C. to N. M. and Calif.— Alt. 5000-10,000 ft. — Grand River at Hot 

 Sulphur Springs ; Doyle's ; vicinity of Boulder ; Chester, Saguache Co. ; Grant 

 Creek; Deadman Canon; Campion's ranch; Miller's ranch, near La Porte. 



8. Elymus triticoides Nutt. In meadows and on hillsides from Mont, to 

 Wash., Colo, and Calif. — Alt. 6000-9000 ft. — Grant Creek; foot-hills, Lari- 

 mer Co. ; Georgetown ; Barnes' ranch, Larimer Co. ; Rist Caiion. 



9. Elymus ambiguus Vasey & Scribn. In caiions and on hillsides in Colo. 

 — Alt. 6000-9000 ft. — Penn Gulch; Empire; Fort Garland; Minnehaha; near 

 Manitou; Engelmann Canon; Rist Canon, Larimer Co.; near Badito; Art- 

 ists' Glen; North Cheyenne Canon; Veta Pass; Campton's ranch. 



10. Elymus sttigosus Rydb. In the foot-hills and on shale slopes in Colo, 

 and Wyo. — Alt. about 7700 ft. — Near Boulder. 



11. Elymus simplex S. & W. Dry plains and hills from Wyo. and Colo, 

 to Ore. — Alt. up to 11,000 ft. — ^Robinson, Summit Co. 



12. Elymus villiflorus Rydb. On plains and foot-hills of Colo. Apparently 

 the same also in the Black Hills and the Canadian Rockies — Alt. 5000-6000 

 ft. — Vicinity of Boulder. 



LOLIUM L. Rye-grass. 



I. Lolium pereune L. In waste places and cultivated ground from N. S. 

 to Va., Calif, and Wash. — Ft. Collins. 



Family 19. CYPERACEAE. Sedge Family. 



Flowers of the spikelets perfect or at least one perfect. 

 Glumes of the spikelets 2-ranked. 



Perianth present, the members bristle-like ; inflorescence axillary. 



1. DULICHIUM. 



Perianth wanting; inflorescence in terminal, solitary or umbelled heads. 



2. Cyperus. 

 Glumes of the spikelets spirally imbricated. 



Base of the style not at all or only slightly thickened, deciduous. 



Perianth-bristles conspicuously elongated. 3. Eriophoeum. 



Perianth-bristles not conspicuously elongated. 4. Scirpus. 



Base of the styles manifestly swollen, persistent as a tubercle on the achenes. 

 Perianth present; spike solitary. S. Eleochaeis. 



Perianth wanting ; spikelets umbellate. 6. Fimeeistylis. 



Flowers monoecious or dioecious. 



Achenes not enclosed in a perigynium ; glumes 2-flowered. 7. Elyna. 

 Achenes enclosed in a perigynium ; glumes i-flowered. 8. Carex. 



