This wetland fern is popping up everywhere right now
iNaturalist Community
Native Plants
If you've got a damp, shady corner of the yard that nothing else will grow in, sensitive fern is the plant other naturalists are spotting everywhere this week, and it thrives exactly where lawns fail.
Sensitive fern is a common woodland and wetland fern with distinctive broad, wavy leaflets, and this week nearly 450 people logged confirmed sightings of it on iNaturalist. That surge usually means the fern is at a visible peak, easy to spot along stream banks, in ditches, and in shady garden beds right now. It gets its name because the fronds die back at the first hint of frost, so late summer is prime viewing season before that happens.
Key Findings
446 research-grade observations of Onoclea sensibilis logged this week on iNaturalist
Ranks among the most-observed plant species on the platform this week
High observation volume suggests the species is at peak visibility during late summer
chevron_right Technical Summary
Sensitive fern is having a moment on iNaturalist, with 446 verified sightings logged this week, signaling that late-summer conditions are putting this wetland fern on full display in yards, trails, and marshes across its range.
Abstract Preview
Original paper
Trending: sensitive fern (Onoclea sensibilis) — 446 observations this week
sensitive fern is among the most observed plant species this week with 446 research-grade observations.
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
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Onoclea sensibilis, the sensitive fern, also known as the bead fern, is a coarse-textured, medium to large-sized deciduous perennial fern. The name comes from its sensitivity to frost, the fronds dying quickly when first touched by it. It is sometimes treated as the only species in Onoclea, but s...