For Calycanthus
Ferry, R.J., Sr., and R.J. Ferry, Jr. 1987. Calycanthus brockiana (Calycanthaceae), a new spicebush from north central Georgia. Sida 12: 339-341.
Johnson, G.P. 1997. Calycanthaceae. In Flora of North America Editorial Committee. 1997. Flora of North America north of Mexico. Volume 3, Magnoliophyta: Magnoliidae and Hamamelidae. Oxford Univ. Press, New York, NY. 590 pp.
Kubitzki, K., J.G. Rohwer, and V. Bittrich, eds. 1993. The families and genera of vascular plants. II. Flowering plants – Dicotyledons – Magnoliid, Hamamelid and Caryophyllid families. Springer, Berlin. 653 pp.
Nicely, K.A. 1965. A monographic study of the Calycanthaceae. Castanea 30: 38-81.
Weakley, A.S. 2017a. No varieties of Calycanthus floridus. In Weakley, A.S., D.B. Poindexter, R.J. LeBlond, B.A. Sorrie, C.H. Karlsson, P.J. Williams, E.L. Bridges, S.L. Orzell, B.R. Keener, A. Weeks, R.D. Noyes, M. Flores-Cruz, J.T. Diggs, G.D. Gann, and A.J. Floden. 2017. New combinations, rank changes, and nomenclatural and taxonomic comments in the vascular flora of the southeastern United States. II. J. Bot. Res. Inst. Texas 11: 291-325.