Onoclea

Onoclea is a genus of plants in the family Onocleaceae, 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.

Species

In the Pteridophyte Phylogeny Group classification of 2016 (PPG I), Onoclea has a single living species:

• †O. fecunda (Lesquereux 1873) Knowlton 1898
• †O. glossopteroides (Dawson 1884) Krassilov 1979
• †O. grandifolia Akhmetiev 1969
• †O. hebridica Gardner 1886
• †O. minima Knowlton 1899
• †O. reducta Cockerell 1908
• O. sensibilis L. (sensitive fern (eastern Asia, eastern North America))

Transferred species

The following Onoclea species have been transferred to other genera as indicated below.

• Onoclea attenuataSw. = Lomaridium attenuatum(Sw.) Gasper & V.A.O.Dittrich
• Onoclea boryanaSw. = Lomariocycas tabularis(Thunb.) Gasper & A.R.Sm.
• Onoclea hintonii(F.Ballard) Christenh. = Onocleopsis hintoniiF.Ballard
• Onoclea intermedia(C.Chr.) M.Kato, T.Suzuki & Nakato = Pentarhizidium intermedium(C.Chr.) Hayata
• Onoclea lineata(Sw.) Sw. = Parablechnum lineatum(Sw.) Gasper & Salino
• Onoclea nudaLabill. = Lomaria nuda(Labill.) Willd.
• Onoclea orientalis(Hook.) Hook. = Pentarhizidium orientale(Hook.) Hayata
• Onoclea pensylvanica(Willd.) Sm. = Matteuccia struthiopteris var. pensylvanica(Willd.) Morton
• Onoclea polypodioides(Sw.) Sw., nom. illeg. = Lomaridium fragile(Liebm.) Gasper & V.A.O.Dittrich
• Onoclea polypodioidesL. = Gleichenia polypodioides(L.) Sm.
• Onoclea scandensSw., nom. illeg. superfl. = Stenochlaena palustris(Burm.fil.) Bedd.
• Onoclea spicant(L.) Hoffm. = Struthiopteris spicant(L.) Weiss – deer fern (Europe, western North America)
• Onoclea spicata(L.f.) Sw. = Lepisorus spicatus(L.f.) Li Wang
• Onoclea striatumSw. = Parablechnum ryanii(Kaulf.) Gasper & Salino
• Onoclea struthiopteris(L.) Hoffm. = Matteuccia struthiopteris(L.) Tod.