- Onoclea Linnaeus, 1753
Onoclea, Biota of North America Program (query database) [BONAP]
- A Synonymized Checklist of the Vascular Flora of the United States, Puerto Rico, and the Virgin Islands; A data base interface; BONAP U.S. Checklist - 1998; Provided by TAMU-BWG; Texas A & M Bioinformatics Working Group; Based on; Biota of North America Program
- Edgar T. Therry, ?1995; The Fern Guide: Northeasten and Midland United States and Adjacent Canada; [Original publication 1961]
- Northern Prairie Wildlife Research Center; http://www.npwrc.usgs.gov/index.htm
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Keep in mind that the taxonomic information is copied from various sources, and may include many inaccuracies. Expert help is welcome.