18 FLORA OF THE YELLOWSTONE NATIONAL PARK. 



Pedicularis Parryi, Gray. 

 Pedicularis scopulorum, Gray. 

 Pedicularis Oroenlandica^ Retz. 

 *Oxyria digyna, Campdera. 



* Polygonum vivipa?-um, L. 



*Salix arctica, R. Br., var. petraea, Anders. 

 *Salix reticulata, L. 



Habenaria obtusata, Richardson. 

 *Lloydia serotina, Reich. 

 *Luzula spicata, Desv. 



Juncus Drummondii, E. Meyer. 



Juncus Parryi, Engelm. 



Gar ex scirpoidea, Michx. 



Garex concinna, R. Br. 



* Garex rigida, Good. 



* Garex atrata, L. 



* Garex alpina, Swartz. 



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

 *? Alopecurus occidentalis, Scribn. 

 *Pleum alpinum, L. 



* Trisetum subspicatum, Beauv. 

 *? Poa refiexa, 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, 

 Gohlie ; 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- 



