The problem of distribution of plant endemics is explored, especially as regards distribution of these plant species on elevational and substrate bases. Endemics per unit area are greater at elevations above 1980 m and on finely textured soils. A summary of data and a list of references is presented.
Welsh, Stanley L.
"Problems in plant endemism on the Colorado Plateau,"
Great Basin Naturalist Memoirs: Vol. 2
, Article 12.
Available at: http://scholarsarchive.byu.edu/gbnm/vol2/iss1/12