Cronquist, A. 1955. Part 5: Compositae. In: Hitchcock, C.L.; Cronquist, A.; Ownbey, M.; Thompson, J.W. Vascular plants of the Pacific Northwest. Seattle, WA: University of Washington Press. 343 p.

Cronquist, A. 1955. Part 5: Compositae. In: Hitchcock, C.L.; Cronquist, A.; Ownbey, M.; Thompson, J.W. Vascular plants of the Pacific Northwest. Seattle, WA: University of Washington Press. 343 p.

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