Consortium of Midwest Herbaria Detailed Collection Record Information
Consortium of Midwest Herbaria - Dryopteris cristata
Consortium of Midwest Herbaria - Dryopteris cristata
North American Network of Small Herbaria Image Library
Dryopteris celsa
Ferns Native Plants PNW
PteridoPortal - Gymnocarpium dryopteris
Dryopteris marginalis
Affiliated Gardens Hardy Fern Foundation