Northeastern Asian Flora
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Osmunda claytoniana L.  
Family: Osmundaceae
[Claytosmunda claytoniana, moreClaytosmunda claytoniana subsp. vestitum (Milde) A.Love & D. Love, Osmunda claytoniana subsp. pilosa (Wall. ex Grev. & Hook.) Fraser-Jenk., Osmunda claytoniana var. pilosa (Wall. ex Hook. & Grev.) Ching, Osmunda claytoniana var. vestita (Wall. ex Hook. & Grev.) Milde, Osmunda pilosa Wall. ex Grev. & Hook., Osmundastrum claytonianum (L.) Tagawa, Osmundastrum claytonianum subsp. pilosum (Wall. ex Grev. & Hook.) Tzvelev, Osmundastrum claytonianum var. pilosum (Wall. ex Grev. & Hook.) W.M.Chu & S.G.Lu, Osmundastrum claytonianum var. vestitum Tagawa, Osmundastrum pilosum (Wall. ex Grev. & Hook.) Shmakov, Plenasium claytonianum C.Presl, Plenasium pilosum (Wall. ex Grev. & Hook.) C.Presl, Struthiopteris claytoniana Bernh.]
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  • Japan Flora
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Japan Flora: The woolly hairs light brown; sterile blades acute; pinnae somewhat glaucescent beneath; fertile pinnae olive­brown to blackish in interrupted pairs in the middle portion of the blade; sterile blades 15-25 cm. wide; pinnae 2-3 cm. wide, the segments 6-8 mm. wide. May-July. Wet places.

Honshu (centr. distr.); locally abundant. Korea, Man­churia, Ussuri, and e. N. America; a variety occurs in For­mosa and sw. China to the Himalayas.

Osmunda claytoniana
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Development supported by College of Agriculture and Life Sciences of Seoul
National University and Korea National Arboretum of Korea Forest Service.
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