sensitive fern

== English == === Etymology === From the observation by early American settlers that the plant is very sensitive to frost, the fronds dying quickly when first touched by it. === Noun === sensitive fern (plural sensitive ferns) Onoclea sensibilis, a coarse-textured, medium to large-sized deciduous perennial fern. ==== Translations ==== === References === Onoclea sensibilis on Wikipedia.Wikipedia Onoclea sensibilis on Wikispecies.Wikispecies Category:Onoclea sensibilis on Wikimedia Commons.Wikimedia Commons