Fern ID & cultural requirements:
https://www.gardengatemagazine.com/articles/flowers-plants/plant-guide/different-types-of-ferns/
Fern species & ID key- Go Botany, Native Plant Trust, Framingham, MA:
https://gobotany.nativeplanttrust.org/simple/ferns/
Basic fern ID:
Click on photo ID:
(many are houseplants)
https://homeguides.sfgate.com/identify-ferns-77504.html
Quick guide- 9 ferns in Acadia, Maine:
Book “ Identifying ferns the easy way”:
https://www.womenowningwoodlands.net/content/identifying-ferns-easy-way
Advanced & technical:
https://www.amerfernsoc.org/about-ferns
Landscaping with ferns from Piedmont Master Gardeners:
Easy ferns for the garden:
Similarity between ferns and mosses:
https://homeguides.sfgate.com/similarities-between-mosses-ferns-64490.html
Club mosses- Lycopodium:
https://gobotany.nativeplanttrust.org/species/lycopodium/clavatum/
Spleenwort:
https://mdc.mo.gov/discover-nature/field-guide/ebony-spleenwort
Types of plant fossils images:
Controlling understory ferns:
https://extension.psu.edu/controlling-understory-fern-competition-for-regeneration-success
The fernery: