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 Caiion ; 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 Canon. 



9. Elymus ambiguus Vasey & Scribn. In canons 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 strigosus 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 perenne 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. Eriophorum. 



Perianth-bristles not conspicuously elongated. 4. Scirpus. 



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

 Perianth present ; spike solitary. 5. Eleocharis. 



Perianth wanting ; spikelets umbellate. 6. Fimbristylis. 



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. 



