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For Packera

Barkley, T.M. 1962. A revision of Senecio aureus Linn. and allied species. Trans. Kan. Acad. 65: 318-408.

Barkley, T.M. 1978. Senecio. N. Amer. Fl. II 10: 50-139.

Barkley, T.M. 1999. The segregates of Senecio, s.l., and Cacalia, s.l., in the flora of North America north of Mexico. Sida 18: 661-672.

Boufford, D.E., J.T. Kartesz, S. Shi, and R. Zhou. 2014. Packera serpenticola (Asteraceae; Senecioneae), a new species from North Carolina, U.S.A. Syst. Bot. 39: 1027-1030.

Bremer, K. 1994. Asteraceae: cladistics and classification. Timber Press, Portland, OR. 752 pp.

Cronquist, A. 1980. Asteraceae, Volume I, Vascular flora of the Southeastern United States. University of North Carolina Press, Chapel Hill, N.C.

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.

Kowal, R.R., A.M. Mahoney, A.S. Weakley, and D. Estes. 2015. Validation and lectotypification of Packera crawfordii (Asteraceae). Phytoneuron 2015-18: 1-2.

Kowal, R.R., and A.M. Mahoney. 2016. Comments on the status of Packera crawfordii (Asteraceae, Senecioneae), a neglected species of the southeastern United States. Brittonia 68: 74-82.

Mabberley, D.J. 2020. Friedrich Dietrich v. Kurt Sprengel and their, largely American, plant-names. J. Bot. Res. Inst. Texas 14: 241-253.

Mahoney, A. M., and R.R. Kowal. 2008. Three new varieties of Packera paupercula (Asteraceae, Senecioneae) in midwestern and southeastern North America. Novon 18: 220-228.

Trock, D.K. 2006. Packera. In Flora of North America Editorial Committee. 2006b. Flora of North America north of Mexico. Volume 20, Magnoliophyta: Asteridae, part 6: Asteraceae, part 2. Oxford Univ. Press, New York, NY. 666 pp.

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.

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