18 FLORA OF THE YELLOWSTONE NATIONAL PARK. 



Pedicularis Parryi, Gray. 



Pedicularis scopulorum, Gray. 



Pedicularis Grcenlandica, Retz. 

 *0xyria digyna, Campdera. 

 *Polygonum viviparum, L. 

 *Salix arctica, R. Br., var. petr&a, Anders. 

 *Salix reticulata, L. 



Hdbenaria obtusata, Richardson. 

 *Lloydia serotina, Reich. 

 *Luzula spicata, Desv. 



Juncus Drummondii, E. Meyer. 



Juncus Parryi, Engelm. 



Car ex scirpoidea, Michx. 



Car ex concinna, R. Br. 



* Carex rigida, Good. 



* Carex atrata, L. 



* Gar ex alpina, Swartz. 



*Festuca ovina, L., var. brevifolia, Wats. 

 *? Alopecurus occidentalis, Scribn. 

 *Pleum alpinum, L. 



* Trisetum subspicatum, Beauv. 

 *? Poa reflexa, V. and S. 

 *Poa alpina, L. 



FLORA OF THE BOGS, PONDS AND STREAMS. 



From the plateau nature of a great portion of the Park, the 

 water from the great accumulations of snow drains off slowly, 

 and in consequence bogs are scattered over the whole region, 

 which in their saturated condition are mostly impassable before 

 July 1st. 



The bog and wet meadow flora from about 7500-9000 feet is 

 luxuriant and of a generally uniform character. There are 

 several species of Stellaria (S. umbellata. Turcz. ; S. longipes, 

 Goldie ; S. borealis, Bigelow) ; Saxifraga (S. punctata, L. ; 

 S. integrifolia, Hook); Valeriana ( V. edulis, Nutt. ; V. sylvatica, 

 Banks) ; Potentilla (P. dissecta, Pursh ; P. gracilis, Dougl. ; P. 

 fruticosa, L.) ; Senecio (S. triangularis. Hook ; S. crassulus, 

 Gray ; S. lugens. Rich.) ; Polygonum (P. Bistorta, L. ; P. vivi- 



