Eight plant associations, not previously described in Colorado, and representative of part of the pre-settlement vegetation spectrum in the oil shale region of northwestern Colorado, are described and illustrated, based on an inventory of relatively undisturbed vegetation remnants.
Baker, William L.
"Some aspects of the presettlement vegetation of the Piceance Basin, Colorado,"
Great Basin Naturalist: Vol. 43
, Article 17.
Available at: https://scholarsarchive.byu.edu/gbn/vol43/iss4/17