Onoclea is a genus of plants in the Onocleaceae family, native to moist habitats in eastern Asia and eastern North America. They are deciduous ferns with sterile fronds arising from creeping rhizomes in spring, dying down at first frost. Fertile fronds appear in late summer. Depending on the authority, the genus contains one to five species.
Commonly accepted Onoclea species and their synonyms include:
Onoclea sensibilis L. 1753 – Sensitive Fern (eastern Asia, eastern North America)
Onoclea orientalis (Hook.) Hook. 1863 (eastern Asia)
Onoclea interrupta (Maxim.) Ching & P.C.Chiu 1974 (eastern Asia)
Onoclea intermedia (C.Chr.) M. Kato, T. Suzuki & Nakato 1991
Onoclea × glaciogena Wagner, Sm. & Pray 2008
Onoclea hintonii (F.Ballard) Christenh. 2011 (southern Mexico, Guatemala)
The following phylogram show a likely relationship between the Onoclea species:
The following Onoclea species have been transferred to other genera as indicated below.
Onoclea attenuata Sw. 1801
=
Blechnum attenuatum (Sw.) Mett. 1856
Onoclea lineata (Sw.) Sw. 1802
=
Blechnum lineatum (Sw.) C.Chr. 1905
Onoclea spicant Hoffm. 1795
=
Blechnum spicant (L.) Sm. 1793 – Deer fern (Europe, western North America)
Onoclea boryana Sw. 1806
=
Blechnum tabulare (Thunb.) Kuhn 1868
Onoclea striatum Sw. Syn. Fil. 304, 422 1806
=
Blechnum striatum (Sw.) C.Chr. 1905
Onoclea polypodioides (Sw.) Sw. 1806 (nom. illeg.)
=
Blechnum fragile (Liebm.) C.V.Morton & Lellinger 1967
Onoclea nuda Labill. 1806
≈
Blechnum nudum (Labill.) Mett. ex Luerss. 1876
Onoclea scandens Sw. 1806 (nom. illeg. superfl.)
=
Stenochlaena palustris (Burm.f.) Bedd. 1876
Onoclea myriothecaefolia Bory ex Willd. 1810
=
Lomaria marattiifolia Desv. 1827
Onoclea polypodioides L. 1771
=
Gleichenia polypodioides (L.) Sm. 1793 (Madagascar, South Africa)
≠
Gleichenia polypodioides (L.) Sw. 1891 (nom. illeg.)
Onoclea spicata Sw. 1803
=
Belvisia spicata (L. f.) Mirb. 1803
Note that some authors consider the genera of the Onocleaceae family to be so similar that they should remain under a single Onolcea genus.
Onoclea struthiopteris (L.) Hoffm. 1795
=
Matteuccia struthiopteris (L.) Tod. 1866 – Ostrich fern
Onoclea nodulosa Michx. 1803 (nom. superfl.)
=
Matteuccia struthiopteris var.
struthiopteris
Onoclea pensylvanica (Willd.) Sm. 1819
=
Matteuccia struthiopteris var.
struthiopteris
