A classification of the natural vegetation of Colorado is presented. This classification, which uses the Plant Association as the basic unit, was developed by sorting data in the scientific literature, supplemented by field research. The classification uses a standardized nomenclature. Citations are given for the literature from Colorado and adjoining states for each Association. The classification includes a total of 403 Plant Associations, with 28 Angiosperm Forests/Woodlands, 2 Mixed Angiosperm–Gymnosperm Forests/Woodlands, 114 Gymnosperm Forests/Woodlands, 100 Shrub Associations, 74 Grassland Associations, 38 Graminoid Associations, and 47 Herb Associations.
Baker, William L.
"A preliminary classification of the natural vegetation of Colorado,"
Great Basin Naturalist: Vol. 44
, Article 11.
Available at: http://scholarsarchive.byu.edu/gbn/vol44/iss4/11