Onoclea sensibilis
Sensitive Fern
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Sensitive Fern (Onoclea sensibilis) - Description
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 the observation by early American settlers that it was very sensitive to frost, the fronds dying quickly when first touched by it. It is sometimes treated as the only species in Onoclea, but some authors do not consider the genus monotypic.
Sensitive Fern (Onoclea sensibilis) - Blooming
In the later part of summer, fertile bronds are borne with small, black segments over their sori.
Sensitive Fern (Onoclea sensibilis) - Growth
Wood fern, spreading clumps of coarse, roughly triangular fronds. Grows best in light shade near the edge of a water source. Thrives in damp sites. Heavy sun will burn the fronds.
Sensitive Fern (Onoclea sensibilis) - Planting
Divide or sow spores when ripe.
Sensitive Fern (Onoclea sensibilis) - Pest
The only real problem is rust.
Sensitive Fern (Onoclea sensibilis) - Interesting facts
There is only one known species of Onoclea found in Eastern Asia and Eastern North America. The fertile fronds' leaflets fold up in cold weather, inspiring the name "sensitive fern".
Sensitive Fern (Onoclea sensibilis) - Soil and irrigation
Moist soil, thrives in swampy soil or dry conditions. Prefers acidic soil that is fertile and humus-rich.
