Astrolepis sinuata imported from iNaturalist photo 33230271 on 28 March 2020.jpg
Die Farrnkräuter in kolorirten Abbildungen naturgetreu Erläutert und Beschrieben (1840) (20727169129).jpg
Taxonomy database of the U.S. National Center for Biotechnology Information
Global Biodiversity Information Facility
United States Department of Agriculture Plants Database
Interim Register of Marine and Nonmarine Genera
Open Tree of Life reference taxonomy version 3.2
Royal Horticultural Society Plant Database