sensitive fern


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Noun1.Sensitive fern - beautiful spreading fern of eastern North America and eastern Asia naturalized in western Europesensitive fern - beautiful spreading fern of eastern North America and eastern Asia naturalized in western Europe; pinnately divided fronds show a slight tendency to fold when touched; pinnules enclose groups of sori in beadlike lobes
fern - any of numerous flowerless and seedless vascular plants having true roots from a rhizome and fronds that uncurl upward; reproduce by spores
genus Onoclea, Onoclea - one species: sensitive fern; in some classifications included in Polypodiaceae
References in periodicals archive ?
Sterile fronds of sensitive fern average 60 cm in height and 30 cm or more at maximum breadth (Johnson, 1993), and those of marsh fern average 45 cm high x 10 cm at widest point (Smith, 1993).
The sensitive fern, Onoclea sensibilis, is the first fern to appear among the grasses and clovers of our yard in the spring.
ONOCLEA {on-oh-KLEE-uh} Linnaeus 1753 * Sensitive Fern * [Greek onos, vessel, and kleiein, to close; son are inclosed by inrolled leaf margins.

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