Northeastern Asian Flora
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Lygodium japonicum (Thunb.) Sw.   (redirected from: Lygodium dissectum Desv.)
Family: Schizaeaceae
[Lygodium dissectum Desv., moreLygodium japonicum f. elongatum Alderw., Lygodium japonicum var. macrostachyum Tagawa, Lygodium japonicum var. microstachyum (Desv.) C.Chr. & Tardieu, Lygodium mearnsii Copel., Lygodium microstachyum Desv., Lygodium microstachyum var. glabrescens Nakai, Lygodium pubescens Kaulf., Lygodium scandens (L.) Sw., Ugena microphylla Cav.]
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Japan Flora: Scandent; rhizomes creeping, 3-4 mm. across, densely covered with soft blackish hairs about 1 mm. long; rachis much elongate, twining, 2-striate, pale brown, lustrous; pinnae alternate, with a pair of pinnate segments and a hairy bud at the tip of a short petiolule, the segments deltoid to ovate, ternately 1- or 2-pinnate, with the rachis puberulent in upper part; sterile pinnae thinly chartaceous, often 3- to 5-lobed to -parted, minutely toothed, the terminal lobe or seg­ments elongate deltoid- to linear-lanceolate, to 60 mm. long, 4-8 mm. wide, acute to obtuse; veins obliquely ascending, once to thrice forked, the veinlets ending in the marginal teeth; sporangia in 2 closely adjacent rows on margin beneath the ultimate segments. Aug.-Jan. Thickets and hedges in low­ lands and low mountains.

Honshu (Kanto Distr., Shinano, Etchu Prov. and westw.), Shikoku, Kyushu; common. Ryukyus, Formosa, Korea and China.

Lygodium japonicum
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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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