Accepted By:
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Flann, C., W.R. Greuter & D. J. N. Hind. 2010. Cassini's Compositae genera: A nomenclatural and taxonomic assessment. Taxon 59(4): 1206–1244.
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Flora of North America Editorial Committee, e. 2006. Magnoliophyta: Asteridae, part 6: Asteraceae, part 1. 19: i–xxiv, 1–579. In Fl. N. Amer.. Oxford University Press, New York.
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