496 GEOLOGICAL SURVEY OF THE TEREITOEIES. 



Scirpus validus, Valil. — Crow Agency. 



Scirpus atrovirens^ Muhl. — Fort Ellis to the Yellowstone. 



Carex Hallii^ Olney, ined. — " It is the same as Hall and Harbour's 

 617, named by Booth G. Parryana, bat quite unlike all the arctic speci- 

 mens I have seen of that species. To the eye it resembles C. scirpoidea, 

 when the latter has a second small spike, but differs in having a shorter, 

 more obovate, smooth, many-nerved perigynium, and more entire scales, « 

 not ciliated. I propose that it should bear the name of Mr. Elihu Hall, 

 of Athens, Illinois, its first collector."— Pleasant Valley. 



Carex vaUicola, Dew. — Pleasant Valley. — " All I have seen of this has 

 been of Hayden's collection." — Olney. 



Carex siccata, Dew. — Pleasant Valley ; Mud Springs. 



Carex Donglassii, Boott. — Mountains south of Virginia City. 



Carex Bonplandiij Kunth, (?) var. minor^ Boott. — Falls of the Yellow- 

 stone. 



Carex f estiva, Dew. — Fort Ellis to the Yellowstone ; Mud Springs 5 

 Yellowstone Lake. 



Ca7'ex aqiiaiiliSj Wahl. — Pleasant Valley ; Upper Falls of the Yellow- 

 stone. 



Carex aquatilis, Wahl., var. minor, Boott. — Yellowstone Lake ; Upper 

 Falls of the Yellowstone. — The i^erigynia have denticulated margins, a 

 character which may carry this plant elsewhere. 



Carex rigida, Good. — Hot Sulphur Springs; Falls of the Yellowstone. 



Carex aurea, Nutt. — Fort Ellis to the Yellowstone. 



Carex Raynoldsii, Dew. — Yellowstone Lake; Great Falls of the Yel- 

 lowstone. 



Carex lamiginosa, Michx. — Stinking Water Creek. 



Carex wmathorhyncha, Desv. — Pleasant Valley, Northern Idaho. 



Carex utricidata, Boott., var. minor, Boott. — Yellowstone Lake j Madi- 

 son Valley. 



Carex ampullacea, Good. — ^Yellowstone Eiver. 



Graminace^. 



Alopeenriis alpimis, Smith. — Stinking Water Creek. — It has most of 

 the florets awnless, and the remainder with a very short awn. 



Flileum aJpinnm, L. — Fort Ellis to the Yellowstone ; Yellowstone 

 Lake; Falls of the Yellowstone. 



Yilfa asperifolia, Nees and Meyen. — Hot Sulphur Springs. 



Vilfa asperifoUa, Nees and Meyen., var. filiformis, Thurber. — Upper 

 Falls of the Yellowstone. 



Agrostis perennans, Tuckerm. — Upper Falls of the Yellowstone. 



Agrostis scabra, Willd. — Mud Springs ; Yellowstone Lake ; Yellow- 

 stone River. 



Muhlenbergia Mexicana, Trin. — Fort Ellis to the Yellowstone. 



Vaseya comata, Thurber. — Gray's Peak, Colorado Territory, JDr. George 

 Smith. 



Calamagrostis Canadensis, Beauv. — Yellowstone Lake. 



Calamagrostis Langsdorffii, Trin. — Upper Falls of the Yellowstone. 



Calamagrostis stricta, Trin. — Yellowstone Lake; Yellowstone Eiver. 



Calamagrotis sylvatica, D. C. — Lower Falls of the Yellowstone. 



Eriocoma cuspidata, Nutt. — Mud Springs; Hot Sulphur Springs. 



Stijya viriduki, Trin. — Fort Ellis to the Yellowstone. 



Aristida piirpurea, Nutt. — Hot Sulphur Springs ; Yellowstone Lake. 



Bouteloua oligostachya, Torr. — Madison Valley ; Fish Creek. 



