POACEAE. 27 



N. M., Ariz, and Mex. Alt. about 7500 ft Mountains, Larimer Co.; La- 

 Veta. 



5. Muhlenbergia cuspidata (Torr.) Rydb. (Vilfa cuspidata Torr. ; Sporo- 

 bolus cuspidatus Woods) On dry plains from Man. to Alb., Mo. and Colo. 

 Exact locality not given. 



6. Muhlenbergia Thurberi Rydb. (Vilfa filiculmis Thurber; Sporobolus 

 filiculmis Vasey; not Dewey) Canons and dry plains from Colo, to W. 

 Tex. and N. M. Alt. up to 9500 ft. Canons west of Ouray. 



7. Muhlenbergia Richardsonis (Trin.) Rydb. (Vilfa Richardsonis Trin. ; 

 Sporobolus depauperatus Coulter in part) On prairies and in meadows from 

 Anticosti to B. C, N. M. and Calif. Alt. 4000-9000 ft. Arboles; George- 

 town; Durango; Mancos; Gunnison; Elk River, Routt Co.; Grizzly Creek; 

 West Mancos Canon ; North Park ; Mountain View, Pike's Peak ; Twin 

 Lakes; Colorado Springs; South Park; Alamosa; Como. 



8. Muhlenbergia simplex (Scribn.) Rydb. (Sporobolus simplex Scribn.) 

 In meadows and along brooks from Nebr. to Wyo. and N. Mex. Alt. 8000- 

 10,000 ft. Georgetown; mountains between Sunshine and Ward; Twin 

 Lakes; southeast of Jefferson, South Park; Crystal Park. 



9. Muhlenbergia filiformis (Thurber) Rydb. (Vilfa depauperate filiformis 

 Thurber) In wet places from Wyo. and Ore. to Colo, and Calif. Steam- 

 boat Springs, Routt Co. 



10. Muhlenbergia aristata Rydb. (Sporobolus aristatus Rydb.) Perhaps 

 only a variety of the preceding. In wet places from Wyo. to Utah and Colo. 

 Alt. about 8500 ft. Columbine. 



11. Muhlenbergia Wolfii (Vasey) Rydb. (Sporobolus Wolfii Vasey) On 

 wet shores in the mountains of Colo. Alt. 9000-10,000 ft. South Park; 

 Twin Lakes; Halfway House. 



12. Muhlenbergia gracilis Trin. On gravelly or sandy soil in the moun- 

 tains from Tex. to Colo, and Calif.; also Mexico. Alt. 5000-10,000 ft. 

 Monument Park; Georgetown; Twin Lakes; Ruxton Dell; canon northeast 

 side of Cheyenne Mountain ; vicinity of Boulder ; Como ; Home ; Buena Vista ; 

 Jefferson, South Park; Manitou; Colorado Springs; Cheyenne Canon; Clear 

 Creek ; Georgetown ; Bosworth's ranch, Stove Prairie ; gulch west of Sol- 

 dier Canon; southeast of Jefferson, South Park; Middle Park; Ute Pass; 

 Empire. 



13. Muhlenbergia subalpina Vasey. (M. gracilis breviaristata Vasey) On 

 dry hills from Wyo. to N. M. Alt. about 10,000 ft. Estes Park, Larimer 

 Co.; Beaver Park; Twin Lakes; Ute Pass; Como. 



14. Muhlenbergia filiculmis Vasey. Perhaps only a depauperate alpine form 

 of the preceding. Mountains of Colo. Alt. 8500 ft. Green Mountain Falls; 

 Como. 



15. Muhlenbergia gracillima Torr. On plains and foot-hills and in canons 

 from Kans. to Colo., Tex. and N. M. Alt. 4000-10,000 ft. Huerf ano ; Mani- 

 tou; Fort Collins; along the Platte River, near Denver; Colorado Springs; 

 Twin Lakes; Timnath; near Owl Canon. 



16. Muhlenbergia pungens Thurb. BLOW-OUT GRASS. On sand-hills and 

 "bad-lands" from Neb. to Utah. Alt. 4000-10,000 ft Twin Lakes; Ster- 

 ling, Logan Co. 



