LITERATURE CITED 



Achuff, P. L. 1991. Plant Species of Special Concern. Montana 

 Natural Heritage Program, Helena. 2 pp. 



Barneby, R. C. 1964. Atlas of North American Astragalus. 

 Memoirs of the New York Botanical Garden 13:1-1188. 



Cronquist, A. 1955. Vascular Plants of the Pacific Northwest. 

 Vol. 5, Compositae. University of Washington Press, 

 Seattle. 343 pp. 



Dorn, R. D. 1984. Vascular Plants of Montana. Mountain West 

 Publishing, Cheyenne, Wyoming. 176 pp. 



Ewan, J. 1945. A Synopsis of the North American Species of 



Delphinium . Univ. Colorado Studies Series D, vol. 2 (2):55- 

 244. 



Henifin, M.S., L. Morse, J.L. Reveal, B. MacBryde, and J.I. 



Lawyer. 1981. Guidelines for the preparation of status 

 reports on rare or endangered plant species. pp. 261-282 

 in: Larry Morse, ed. Rare Plant Conservation. New York 

 Botanical Garden. Bronx, NY. 



Hickman, J. C. 1984. Nomenclatural Changes in Persicaria, 



Polygonum , and Rumex (Polygonaceae) . Madrono 31:249-252. 



Hitchcock, C. L. and A. Cronquist. 1961. Vascular Plants of the 

 Pacific Northwest. Vol. 3, Saxif ragaceae to Ericaceae. 

 University of Washington Press, Seattle. 614 pp. 



Hitchcock, C. L. and A. Cronquist. 1964. Vascular Plants of the 

 Pacific Northwest. Vol. 2, Salicaceae to Saxif ragaceae. 

 University of Washington Press, Seattle. 597 pp. 



Hitchcock, C. L. and A. Cronquist. 1973. Flora of the Pacific 

 Northwest. University of Washington Press, Seattle. 730 

 pp. 



Hitchcock, C. L. , A. Cronquist, and M. Ownbey. 1969. Vascular 

 Plants of the Pacific Northwest. Vol. 1, Vascular 

 Cryptogams, Gymnosperms, and Monocotyledons. University of 

 Washington Press, Seattle. 914 pp. 



Holdorf, H. and D. Sirucek. 1988. Land System Inventory of the 

 Helena National Forest. U. S. Department of Agriculture - 

 Forest Service in conjunction with Soil Conservation 

 Service. 266 pp. + tables. 



