Accepted By:
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Abrams, L. 1923. Ferns to Birthworts. 1: 1–557. In L.R. Abrams (ed.) Ill. Fl. Pacific States. Stanford University Press, Stanford.
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Böcher, T. W. 1978. Greenlands Flora 326 pp.
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Gleason, H. A. & A. J. Cronquist. 1968. The Pteridophytoa, Gymnospermae and Monocotyledoneae. 1: 1–482. In H. A. Gleason Ill. Fl. N.E. U.S.. New York Botanical Garden, New York.
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Hitchcock, A. S. 1951. Man. Grasses U.S. (ed. 2) 1–1051. U.S. Department of Agriculture, Washington, D.C.
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Hitchcock, C. H., A. J. Cronquist, F. M. Ownbey & J. W. Thompson. 1969. Vascular Cryptogams, Gymnosperms, and Monocotyledons. 1: 1–914. In C. L. Hitchcock Vasc. Pl. Pacif. N.W.. University of Washington Press, Seattle.
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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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Voss, E. G. 1972. Gymnosperms and Monocots. i–xv, 1–488. In Michigan Fl.. Cranbrook Institute of Science, Bloomfield Hills, Michigan.
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Welsh, S. L. 1974. Anderson's Fl. Alaska Adj. Parts Canada i–xvi, 1–724. Brigham Young University Press, Provo.
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