Shaw, R.J. 1989. Vascular Plants of Northern Utah: An Identification Manual. Utah State University Press. Logan, Utah. 412p.
Stubbendieck, J., S.L. Hatch and C.H. Butterfield. 1997. North American Range Plants. 5th Edition. University of Nebraska Press. Lincoln, Nebraska. 501p. Taylor, R.J. 1992. Sagebrush Country – A Wildflower Sanctuary. Mountain Press Publishing Company. Missoula, Montana. 212p. Tilford, G.L. 1997. Edible and Medicinal Plants of the West. Mountain Press Publishing Company. Missoula, Montana. 239p.
USDA, ARS. 1980. Plants Poisonous to Livestock in the Western States. Agricultural Information Bulletin 415. U.S. Government Printing Office. Washington, D.C. 90p. USDA, FS. ----. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory (Producer). Available: http://www.fs.fed.us/database/feis [2008, July 22]. [FEIS] USDA, FS. 1960. Notes on Western Range Forbs. Agriculture Handbook No. 161. Equisetaceae through Fumariaceae. Washington, D.C.
USDA, NRCS. 2007. The PLANTS Database (http://plants.usda.gov, 22 June 2007). National Plant Data Center, Baton Rouge, LA 70874-4490 USA. (citation must be updated on prep for printing. ↓ USDA, NRCS. 2012. The PLANTS Database (http://plants.usda.gov, 5 April 2012). National Plant Data Team, Greensboro, NC 27401-4901 USA. Welsh, S.L. 1990. Wildflowers of Zion National Park. Zion Natural History Association. Springdale, Utah. 136p.
Welsh, S.L., N.D. Atwood, S. Goodrich, and L.C. Higgins (eds.) 2003. A Utah Flora, 3rd Edition. Jones Endowment Fund, Monte L. Bean Life Sciences Museum, Brigham Young University. Provo, Utah. 912p. Weber, W.A. and R.C. Wittmann. 2012. Colorado Flora Western Slope Fourth Edition A Field Guide to the Vascular Plants. University Press of Colorado, Boulder. 532p.
Zomlefer, W.B. 1994. Guide to Flowering Plant Families. University of North Carolina Press. Chapel Hill, North Carolina. 430p.
Internet References: Central Washington Native Plants: http://www.cwnp.org/ http://www.laspilitas.com/plants/102.htm
http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066213 178