A.R.Sm. (Christ) 2006 - Smith AR, Kreier H-P, Haufler CH, Ranker TA, Schneider H (2006) Serpocaulon (Polypodiaceae), a New Genus Segregated from Polypodium. Taxon 55(4): 919-930. doi: 10.2307/25065686.
There is no corrections for Serpocaulon ptilorhizon yet.