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Dinghushan | Family List | Lygodiaceae | Lygodium

Lygodium japonicum (Thunb.) Sw.

海金沙

Description from Flora of China

Ophioglossum japonicum Thunberg in Murray, Syst. Veg., ed. 14, 926. 1784; Hydroglossum japonicum (Thunberg) Willdenow; Lygodium chaerophylloides Desvaux; L. cochinchinense Desvaux; L. dissectum Desvaux; L. japonicum var. microstachyum (Desvaux) C. Christensen & Tardieu; L. microstachyum Desvaux; L. microstachyum var. glabrescens Nakai; L. pubescens Kaulfuss.

Rhizome widely creeping, dichotomously branched, 2-5 mm in diam., densely clothed with dark brown hairs, fronds commonly 5-10 mm apart. Juvenile fronds erect, first branching an unequal dichotomy (?always), two main branches of large fronds bipinnate, deltoid in outline, with palmatisect pinnae, pinna margins doubly serrate. Rachis of climbing fronds hardly ca. 2 mm in diam., glabrous except for minute hairs on flattened adaxial surface between narrow wings; primary rachis branches 3-10 mm, dormant apex covered with pale hairs; secondary branches of fronds on young or stunted plants pinnate, on well-grown fronds bipinnate or tripinnate, deltoid in outline, commonly ca. 12 cm long and wide, rachises densely shortly hairy on adaxial surface and with fewer longer hairs elsewhere; sterile tertiary pinnae of lower rachis branches palmate with 5-7 lobes, middle lobe much longer than lateral lobes, tertiary pinnae higher up frond 3-lobed with an elongate middle lobe or pinnate with small oblique and often lobed quaternary pinnae and a usually deltoid-pinnatisect terminal pinna ca. 3 cm, margins acutely biserrate, apex obtuse or subacute; stalks of pinnae up to 3 mm, never articulate or thickened at apex; costae usually with long scattered hairs, veins and surfaces usually glabrous but sometimes shortly hairy; fertile secondary branches tripinnate, pinnae smaller than sterile pinnae, sorophores 2-12 mm; indusia glabrous or with few hairs if lamina hairy; spores finely low tuberculate to verrucose with prominent laesurae.

Climbing in secondary vegetation; sea level to ca. 500 m (in Taiwan). Anhui, Chongqing, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shanghai, Sichuan, Taiwan, Xizang, Yunnan, Zhejiang [Bhutan, India, Indonesia (Java), Japan, Kashmir, Korea, Nepal, Philippines, Sri Lanka; tropical Australia, North America].

生活型: 草本

栽培植物: 野生

特征: 攀援草本;

生境: 生于路旁、山坡灌丛中

用途: 全株入药,清热利湿、清肿通淋,治肾炎、小便不利、血尿、砂淋、 痢疾、急性热病、烦热惊狂及烫火伤等疾。为“广东凉茶”原料之一;茎叶可作农药。

门中名: 蕨类植物门

中文别名: 牛沙林(云浮)


 

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