‘ 
BOTANICAL OBSERVATIONS IN WESTERN WYOMING. 18 
following as most abundant and characteristic: Arenaria pun- 
gens Nutt., var. Astragalus microcystis Gray, Heuchera cylindrica 
Dougl., Bahia leucophylla DC., Stephanomeria paniculata Nutt. 
On reaching the upper portion of this valley, becoming more 
- densely wooded, and frequently spreading out into open, grassy 
parks, a much more attractive and varied flora is brought to view. 
- The pine woods, composed almost exclusively of Pinus contorta, 
ee -_-with scattering trees of Abies grandis, and in the drier mountai 
slopes of Abies Douglasii, overshadow thick moss-hedded festoons 
of Linnea borealis, associated with Pyrola minor L., and occa- 
sionally the more peculiar western form of Pyrola dentata Hook. 
Here too occurs abundantly Antennaria racemosa Hook., with 
sterile and fertile plants growing in distinct plots; scanty speci- 
mens were also collected of what is probably the little known An- 
tennaria luzuloides Torr. and Gray. Everywhere on the moist, 
wooded slopes is a thick undergrowth of Vaccinium mz iyrtilloides 
x amnus is represented by the well known northern form 
of Rhamnus alnifolius L. Her., and on the margins of ice-cold 
springs we meet with Mimulus moschatus Dougl. In ascending 
the higher mountain peaks, the rocky crags are brilliantly adorned 
with clumps am eeenitemon deustus Dougl., or the more showy 
_ Pen tstemon ziesii Hook. Along the borders of alpine brooks, 
together with te wide-spread Mertensia Sibirica Dougl., we meet 
with the showy Mimulus Lewisii Ph., so interesting in its associa- 
tion with the early explorer Lewis. Mitella trifida Gray is here 
found associated with the more common Mitella pentandra Hook. 
In similar localities, strangely remote from their original habitat, 
we meet with Zauschneria Californica Presl and Kellogia galioides 
—  Torr.! Neat the bald alpine summits, where the ground is satu- 
rated from the recent melting of snow-drifts, grows the ‘Cali- 
fornia heath,” Bryanthus empetriformis Gray, and here also at the 
most eastern locality yet noted was found a dwarf form of 
Spraguea umbellata Torr. The occurrence of so many peculiar 
Californian forms in such an isolated locality on the Atlantic slope 
is very suggestive. 
On the high alpine crest at the head of Stinking Water, over- 
looking to the west the Yellowstone basin and its magnificent 
lake, a more alpine flora is exhibited, though composed mainly of 
dwarfed forms of plants met with lower down, as may be seen 
from the following list, noted down August 2, viz: Arabis Drum- 
(107) 
