Lygodium japonicum is a perennial climbing herb. Rhizomes are thin, creeping and puberulent. The stems are thin, straw-colored and have white hairs. The margin is serrated or irregularly divided, the upper leaflet is sessile, pinnate or halberd-shaped, and the lower leaflet is stipitate; The sterile feather is triangular, which is usually similar to the fertile feather.
Extended data:
Herbaceous perennial liana, 1 ~ 5m long. Rhizomes walk horizontally with dark brown knotted hairs; The roots are hairy, dark brown, tough and hairy. Leaves are numerous, opposite to the short branches on the stem, dimorphic and papery.
There are sparse short hairs along leaf axis and feather axis: the top of vegetative body is triangular, the length and width are 10 ~ 300 px respectively, and it is bipinnately shaped, the pinnae is strong or 3-lobed, the width is 3 ~ 8 mm, the edge has irregular thin and blunt serrations, and the spore leaves are oval triangle, the length and width are 10 ~ 500 px respectively. At the end of summer, tassel-shaped sporangium spikes are born at the lower edge of the feather, which are 2 ~ 5 mm long and dark brown, with small warts on the spore surface.
Location: Guangdong, Zhejiang; Jiangsu, Jiangxi, Hunan, Hubei, Sichuan, Guangxi, Fujian, Shaanxi and other places are also produced.
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