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Onocleasensibilis Linnaeus. Sensitive Fern, Bead Fern. Phen: May-Jun. Hab: Marshes, swamps, bottomland forests, ditches, wet disturbed places. Dist: NL (Newfoundland) west to MN and CO, south to FL and TX. O. interrupta (also treated as a variety or included in O. sensibilis without taxonomic recognition (see synonymy) is e. Asian.
Origin/Endemic status: Native
Taxonomy Comments: Two taxa of Onoclea, one in e. North America and one in e. Asia, should be recognized (Gastony & Ungerer 1997); the appropriate rank is not agreed on, though Gastony & Ungerer (1997) demonstrated a similar level of distinction as various disjunct sibling pairs in other fern genera.
Other Comments: The specific epithet and common name refer to the fact that the fronds wither at the first touch of frost, not that they respond to touch. The peculiar fertile leaves (with their brown, beadlike, fertile pinnules) are collected for use in dried arrangements.
Synonymy ⓘ: = AqW, Gastony & Ungerer (1997); = Onocleasensibilis L. var. sensibilis – TxFerns, Va; < Onocleasensibilis L. – Ar, C, ETx1, F, Fl1, FNA2, G, GrPl, Il, K1, K4, Mo1, NE, NY, Pa, RAB, S13, Sf, Tat, Tx, W, WH3, WV, Lin et al (2013)
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Horticultural Information
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Height:1-2 ft.
plant sale text:Sensitive fern makes an excellent groundcover, spreading readily by means of its rhizomes. It looks its best in an area that stays consistently moist. It is one of the easiest ferns to grow. Plant where spreading will be an asset rather than a problem. Commonly found growing in marshes, ditches and swamps, it will tolerate more sunlight if planted in soil that stays wet. Can provide shelter for frogs and salamanders. The genus Onoclea supports up to 3 species of lepidoptera.
