For Calycanthaceae
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.
Li, J., J. Ledger, T. Ward, and P. del Tredici. 2004. Phylogenetics of Calycanthaceae based on molecular and morphological data, with a special reference to divergent paralogues of the nrDNA ITS region. Harvard Papers in Bot. 9: 69-82.
Nicely, K.A. 1965. A monographic study of the Calycanthaceae. Castanea 30: 38-81.
Wood, C.E. 1958. The genera of the woody Ranales in the southeastern United States. J. Arnold Arb. 39: 296-346.