Synonyms

Homotypic

• Basteria calycanthus Mill., Gard. Dict., ed. 8. 1768.
• Beurera florida (L.) Kuntze, Revis. Gen. Pl. 5. 1891.
• Buttneria florida L.) Kearney. Bull. Torrey Bot. Club 21: 175. 1894 (Buettneria).
• Butneria floridus (L.) Britton
• Calycanthus mollis Raf., Alsogr. Amer. 7. 1838, nom. illeg.

Heterotypic

• Butneria mohrii Small, Fl. S.E. U.S. (Small). 528, 1331. 1903.
• Calycanthus acuminatus Hort. ex K.Koch, Hort. Dendrol. 183. 1853.
• Calycanthus brockianus R.J.Ferry & R.J.Ferry f., Sida 12(2): 340. 1987, as brockiana.
• Calycanthus bullatus Hort. ex K.Koch, Dendrologie 1: 365. 1869.
• Calycanthus floridus var. oblongatus Aiton, Hortus Kew. (W. Aiton) 2: 220. 1789.
• Calycanthus floridus var. oblongus Aiton f.
• Calycanthus floridus var. ovatus Aiton, Hortus Kew. (W. Aiton) 2: 220. 1789.
• Calycanthus glaucus oblongus Schelle, Handb. Laubholzben. 121. 1903.
• Calycanthus mohrii Small ex Pollard, N. Amer. Fl. 22: 238. 1908.
• Calycanthus sterilis Walter, Fl. Carol. (Walter) 151. 1788.
• Calycanthus tomentosus Raf., Alsogr. Amer. 7.
  

Note: Not all of this synonymy is recognised by Govaerts et al. (2014), particularly Calycanthus brockianus R.J.Ferry & R.J.Ferry f. is circumscribed as a distinct species.