Accepted By:
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Cronquist, A. J., A. H. Holmgren, N. H. Holmgren & Reveal. 1977. Vascular Plants of the Intermountain West, U.S.A. 6: 1–584. In A. J. Cronquist, A. H. Holmgren, N. H. Holmgren, J. L. Reveal & P. K. Holmgren (eds.) Intermount. Fl.. Hafner Pub. Co., New York.
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Moss, E. H. 1983. Fl. Alberta (ed. 2) i–xii, 1–687. University of Toronto Press, Toronto.
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Scoggan, H. J. 1978 [1979]. Pteridophyta, Gymnospermae, Monocotyledoneae. 2: 93–545. In Fl. Canada. National Museums of Canada, Ottawa.
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