Kathleen Garness and Gerould Wilhelm, March 2021. Conservation Research Institute.
Illustrated Ferns and Lycophytes of the Chicago Region PDF: https://conservationresearchinstitute.org/files/lychens/ferns_lycophytes.pdf
![](https://panama.inaturalist.org/assets/logo-eee-15px-8f26cb7404257fa9b8ee143ca65be95b53e98e56f81ff1678848b9e3ae2e13ee.png)
Kathleen Garness and Gerould Wilhelm, March 2021. Conservation Research Institute.
Illustrated Ferns and Lycophytes of the Chicago Region PDF: https://conservationresearchinstitute.org/files/lychens/ferns_lycophytes.pdf