FLORA OF THE YELLOWSTONE NATIONAL PARK. 39 



Epilobium spicatum, Lam. 



Dry places, principally on the burnt areas. Mammoth Hot Springs, 

 6300 ft. alt.; Mirror Lake Plateau, 8800 ft. alt.; Alum Creek (Forwood); 

 Mud Springs (Adams). 



Epilobium latifolium, L. 



Dry washes along Soda Butte Creek, 7700 ft. alt. Not common. 



Epilobium suffruticosum, Nutt. 



With the former. Yellowstone Lake and Upper Falls of the Yellow- 

 stone (Adams). 



Epilobium alpinum, L. 



Rather common on subalpine mountain slopes. 



Epilobium coloratum, Muhl. 



Alum Creek (Forwood); Mud Springs (Adams). 



Epilobium Drummondii, Ilausknecht (E. origanifolium, Lam.). 



"Hausknecht does not allow E. origanifolium, Lam., to be Ameri- 

 can" (Watson). Coal bogs and mountain streams, 7500-9500 ft. alt. 



Epilobium Hornemanni, Reich, (a form of E. origanifolium, Lam.). 

 With the preceding. 



Epilobium paniculatum, Nutt. 



Dry, open grassy slopes. Soda Butte, 7000 ft. alt. 



Gayophytum ramosissimum, Torr and Gray. 



Very common on dry banks up to 8000 ft. alt. 



Gayophytum racemosum, Torr and Gray. 

 With the preceding. 



(Enothera biennis, L. 



Hot Sulphur Springs and Yellowstone Lake (Adams). 



<Enothera albicaulis, Nutt. 

 Mud Springs (Adams). 



(Enothera caespitosa, Nutt. 



Dry rocky places. Mammoth Hot Springs, 6400 ft. alt. Rare. 



(Enothera triloba, Nutt. 



Yellowstone Lake (Coulter). 



(Enothera brachycarpa, Gray (CE. marginata, var. purpurea). 



Hot Sulphur Springs (Adams) ; Hot Springs along the Yellowstone 

 (Coulter). 



