FLORA OF THE YELLOWSTONE NATIONAL PARK. 65 



Prosartes trachycarpa, Wats. 



Timbered slopes. Mammoth Hot Springs, 6500 ft. alt. 



Zygadenus elegans, Piusli. 



Bogs, 60C0-8500 ft. alt. Common. 



Zygadenus venenosus, Wats. 



Mammoth Hot Springs. Rare. 



JUNCACE^. 



Luzula spadicea, DC, var. parviflora, Meyer. 



Bogs and wet meadows, 7000-9000 ft. alt. Common. 



Luzula comosa, Meyer. 



Indian Creek, 8000 ft. alt. ; Cache Creek, 7500 ft. alt. 



Luzula campestris, DC. 



Grassy slopes, 7500-9500 ft. alt. Common. 



Luzula spicata, Desv. 



On high alpine summits. Common throughout. 



Juncus Balticus, Deth., var. montanus, Engelm. 



Bogs and along streams up to 8000 ft. alt. Common. 



Juncus Drummondii, E. Jleyer. 

 With the preceding 



Juncus Parryi, Engelm. 



Upper Falls of the Yellowstone (Adams). 



Juncus tenuis, Wilkl., var. congestus, Engelm. 



Muddy shore of Turbid Lake, 7000 ft. alt. ; Lower Geyser Basin 

 (Coulter); Mud Springs (Adams). 



Juncus bufonius, L. 



Turbid Lake and the Geyser Basins. 



Juncus longistylis, Torr. and (Jray. 



Wet places. Common from 7000-9000 ft. alt. 



Juncus Canadensis, .J. Gay, var. coarctatus, Engelm. 



Mammoth Hot Springs, 6400 ft. alt. Mud Springs (Adams). 



Juncus Mertensianus, Jleyer. 



East Fork, 7500 ft. alt.; Slough Creek, 6500 ft. alt.; Yellowstone Lake 

 and Upper Falls of tlie Y''ellowstone (Adams). 



