During the year the program of study on sagebrush sites and populations has been intensified. There can now be recognized six distinct species in the big sagebrush group which occur in Wyoming. Of these Artemisia cana, A. nova, and A. viscidula are uniform in occurrence but A. tridentata may be divided into four ecotypes, A. arbuscula into two, and A. tripartita into two. The distribution patten of these types, has been determined. Further study is now underway to characterize these areas as to site to determine evolutionary relationships and to relate Wyoming sagebrush types to sagebrush patterns occurring in other western states. Project Number 64.
Jackson Hole Research Station Annual Report: Vol. 1956
, Article 5.
Available at: http://repository.uwyo.edu/jhrs_reports/vol1956/iss1/5