4 BOTANICAL OBSERVATIONS IN WESTERN WYOMING. 
Patagonica Jacq., Gilia inconspicua Dougl., and Oxytheca dendro- 
idea Nutt. In the moist grassy valley of Little Sandy were also 
found quite abundantly Capsella divaricata Walp. and Gentiana 
humilis Stev., heretofore overlooked by collectors in this region. 
Of perennial plants, serving somewhat to relieve the prevalent 
and monotonous growth of Artemisia, Tetradymia and Linosyris, 
comprising what is popularly known as “wild sage,” and the 
equally forbidding Chenopodiaceous shrubs confounded under the 
common term of ‘* grease-wood,” may be noted several species of 
Astragalus including lt. Purshii Dougl., A. lotiflorus Hook, A. 
glareosus Dougl., A. junceus Nutt., and now collected for the first 
time since Nuttall’s original discovery, A. pubentissimus Nutt. 
and A. flavus Nutt., the former a not uncommon roadside plant, 
and the latter quite abundant along the margins of dry ee 
courses, at the foot of steep clay buttes. 
On gravelly knolls adjoining Green River still another inter- 
esting Nuttallian plant was rediscovered, Tanacetum Nuttallii 
Torr. & Gray, and growing in close proximity with this was 
found Vesicaria Alpina Nutt., both probably near the original 
station of Nuttall. 
Nearly everywhere over this district in exposed situations we 
meet with Eriogonum ovalifolium Nutt., forming dense silvery 
cushions, its close globular heads of flowers exhibiting a great 
variety of tints from pure white to dark brown. Almost equally 
abundant on gravelly slopes also occur Aplopappus acaulis Gray, 
and Astragalus simplicifolius Gray, presenting a neat contrast 
of colors in their bright yellow and blue flowers, resting in mats of 
dark green and silvery foliage. 
Quite constantly associated in growth with Astragalus flavus 
Nutt. is a showy asteroid plant with large white flowers, disposed 
in flattened summits surmounting the dull colored tomentose leaves. 
This plant, according to Dr. Gray, is closely allied to or perhaps 
identical with the Xylorhiza villosa Nutt. (Aster Xylorhiza Torr. 
& Gray). In view of the discrepancy in many respects between 
ae plant and that described by Nuttall, Dr. Gray has thought 
proper to characterize it as a new species, Aster Parr yi. 
Among other plants worthy of note in this district may be 
enumerated Delphinium Menziesii DC., Sisymbrium junceum 
Bieb., Viola Nuttallii Pursh, Cymopterus montanus Nutt., Cym- 
ses sea Gray, Antennaria dimorpha Nutt., Artemisia 
10-11 
