14 BOTANICAL OBSERVATIONS IN WESTERN WYOMING. 
mondii Gray, Arabis canescens Nutt., Draba alpina L., Smelowskia 
calycina C. A. Mey., Arenariu arctica Stev., Ivesia Gordoni Torr. 
and Gray, Potentilla dissecta Pursh, Astragalus alpinus L., Astrag- 
alus Kentrophyta Gray, Lupinus minimus Dougl., Sedum stenope- 
talum Ph., Townsendia (not determined as to species. 145), 
Lrigeron compositum Ph., Senecio canus Hook., Achillea millefolium 
L., Phlox Douglasii Hook., Polemonium humile var. (P. parvifolium 
Nutt.), Mertensia alpina Doug]., Myosotis alpestris L., Eriogonum 
ovalifolium Nutt. 
In a concluding article, the general botanical features of Yel- 
lowstone Park and the head waters of Snake and Wind Rivers will 
be considered. 
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