Accepted By:
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Cody, W. J. 1996. Fl. Yukon Terr. i–xvii, 1–669. NRC Research Press, Ottawa.
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Hultén, E. 1968. Fl. Alaska i–xxi, 1–1008. Stanford University Press, Stanford.
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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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Nasir, E. & S. I. Ali (eds). 1980-2005. Fl. Pakistan Univ. of Karachi, Karachi.
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Porsild, A. E. & W. Cody. 1980. Vasc. Pl. Continental Northw. Terr. Canada i–viii, 1–607. National Museum of Natural Sciences, Ottawa.
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