interrupted fern (Osmunda claytoniana) observed in SR-102, Bar Harbor, ME, US
iNaturalist: middlematt7
Native Plants
Interrupted fern is a reliable indicator of healthy, undisturbed woodland — spotting it on a trail tells you the forest floor beneath your feet has likely never been plowed or heavily developed.
Someone spotted and documented an interrupted fern growing in Bar Harbor, Maine, and the iNaturalist community confirmed the identification as research-grade. Interrupted fern is a striking native fern with a distinctive look — its fertile leaflets appear in the middle of the frond, 'interrupting' the green ones, which is how it got its name. Observations like this help scientists and naturalists track where these ferns are thriving across the landscape.
Key Findings
Research-grade status confirmed by the iNaturalist community, meaning multiple observers agreed on the identification
Location recorded in SR-102, Bar Harbor, ME — coastal Maine woodland habitat
Species is Osmunda claytoniana, a native North American fern known as an old-growth woodland indicator
chevron_right Technical Summary
A research-grade observation of interrupted fern (Osmunda claytoniana) was recorded in the SR-102 area of Bar Harbor, Maine. This citizen-science sighting contributes to community-verified distribution data for this native North American fern.
Abstract Preview
Research-grade observation of interrupted fern in SR-102, Bar Harbor, ME, US.
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Species Mentioned
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Claytosmunda is a genus of fern. It has only one extant species, Claytosmunda claytoniana, the interrupted fern, native to Eastern Asia, Eastern United States, and Eastern Canada.