For Packera
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Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C. Google Scholar
Gramling, A.E. 2006. A conservation assessment of Packera millefolium, a Southern Appalachian endemic. M.S. thesis, Univ. of North Carolina at Chapel Hill, Curriculum in Ecology. Google Scholar
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Weakley, A.S., R.J. LeBlond, B.A. Sorrie, C.T. Witsell, L.D. Estes, K.G. Mathews, A. Ebihara, and K. Gandhi. 2011. New combinations, rank changes, and nomenclatural and taxonomic comments in the vascular flora of the southeastern United States. J. Bot. Res. Inst. Texas 5: 437-455. Google Scholar
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