FLORA OF THE YELLOWSTONE NATIONAL PARK. 61 



Polygonum polygaloides, Meisner. 



Blacktail Deer Creek, 7300 ft. alt. 



Polygonum amphibium, L. 



Common iu ijonds about Yellowstone Lake. Bi oad Creek, 8300 ft. alt. 



Polygonum Muhlenbergii, Wats. 

 Red Mountain (Coulter). 



Polygonum Bistorta, L. 



Bogs and meadows, 7500-9500 ft. alt. Extremely common in subal- 

 pine meadows. The commcm form is var. linearifolitim, Wats. 



Polygonum viviparum, L. 



With the preceding, but much less common. Indian Creek, 8000 It. 

 alt.; Cache Creek, 7400 ft. alt.; Firehole River (Coulter); Yellowstone 

 Falls (Adams). 



EL^AGNACE^. 



Elaeagnus argentea, Pursh. 



Mammoth Hot Spring's. Rare. 



Shepherdia Canadensis, Nutt. 



Bell Peak, 8400 ft. alt. ; Cache Cieek, 7G00 ft. alt. Yellowstone Lake 

 (Adams). 



LORANTHACE^. 



Arceuthobium Americanum, Nutt. 

 Common on Pinus Murrayana. 



SANTALACEJE. 



Comandra pallida, A. DC 



Dry banks, common up to 8000 ft. alt. 



EUPHORBIACEJE. 



Euphorbia serpyllifolia, Pers. 



Common on the formation of the Geyser Basins. 



Euphorbia glyptosperma, Eiigelm. 

 Yellowstone Lake (Adams). 



Euphorbia dictyosperma, Fiscb. & Meyer. 

 Yellowstone (Forwood). 



