BOTANICAL OBSERVATIONS IN WESTERN WYOMING. 105 
and it was only by diligent search that sufficient late flowering 
specimens were met with to complete the description. 
Besides this choice addition to our native flora, other plants 
worthy of note may be enumerated, viz: Anemone multifida DC., 
Arenaria arctica Stev., Arenaria Rossii R. Br., Lupinus minimus 
Dougl., Oxytropis campestris L., Spiræa cæspitosa Nutt., Saxifraga 
Jamesii Torr., Saxifraga debilis Engel., Phlox Douglasii Hook., 
Polemonium confertum Gray, Androsace chamæjasme L., Castilleia 
pallida Kth., Lloydia serotina Reich. 
The peculiarities of the timber growth in this section will be 
more fully dwelt on in a subsequent article ; it is sufficient here to 
note the regular order of succession everywhere noticeable as dis- 
tinct zones of arborescent growth. Thus the lower mountain 
slopes are occupied by scattered groves of Pinus ponderosa and 
Abies Douglasii, succeeded higher up by Pinus flexilis and Pinus 
contorta, while the highest ridges support a dense forest of Abies 
Engelmanni. 
In descending the northeastern slope of the Owl Creek range, 
forming the western edge of the Big Horn basin, we come upon 
principal tributary streams draining the high mountain region to 
the west. In all these valleys, including Owl Creek, Gray Bull 
and Stinking Water, a uniform character of vegetation is observ- 
able, constituting a very distinct botanical district. On the steep 
gravelly ridges bounding the valley of Owl Creek was first noticed 
a very remarkable species of Stanleya, distinguished from all other 
known species of this interesting genus by the dense tomentose 
covering of its stem and foliage, and the sharply hastate form of 
its leaves. I have accordingly named it Stanleya tomentosa, n. sp. 
(see appendix, No. 13). This plant, then (July 20), in the full 
glory of its dense spike of cream-colored flowers, formed a con- 
spicuous feature in the floral landscape. In this same locality was 
also found a new species of Phelipwa, which on account of its 
bright yellow color I have named Phelipea lutea, n. sp. (see ap- 
pendix, No. 202). This plant, which is met with growing in close 
proximity to the’ allied species, Phelipwa fasciculata Nutt., fur- 
-nished an opportunity for a direct comparison of fresh living speci- 
mens, thus affording a more satisfactory means of distinguishing 
specific difference than could be derived from the dry faded plants. 
~ Along the borders of a dry ravine was collected a yellow flowered 
-~ Astragalus with nearly mature fruit. -This, on a cursory view, I 
