The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

  • Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
  • Cronquist, A. J. 1994. Vascular plants of the intermountain west, U.S.A. 5: 1–496. In A. J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermount. Fl. Hafner Pub. Co., New York.
  • Flora of North America @ eFloras.org
  • Flora of North America Editorial Committee, e. 2006. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. 19: i–xxiv. In Fl. N. Amer. Oxford University Press, New York.
  • Great Plains Flora Association. 1986. Fl. Great Plains i–vii, 1–1392. University Press of Kansas, Lawrence.
  • Hitchcock, C. L., A. Cronquist, M. Ownbey & J. W. Thompson. 1984. Compositae. Part V. 343 pp. In Vasc. Pl. Pacific N.W. University of Washington Press, Seattle.
  • Isotype: Rydberg, P. A. 1900. Mem. New York Bot. Gard. 1: 453.
  • Moss, E. H. 1983. Fl. Alberta (ed. 2) i–xii, 1–687. University of Toronto Press, Toronto.
  • Scoggan, H. J. 1979. Dicotyledoneae (Loasaceae to Compositae). Part 4. 1117–1711 pp. In Fl. Canada. National Museums of Canada, Ottawa.

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