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Dinghushan | Family List | Convolvulaceae | Cuscuta

Cuscuta japonica Choisy

日本菟丝子

Description from Flora of China

Stems yellow or often with purplish spots, slightly stout, 1-2 mm in diam., many branched. Inflorescences spicate, ca. 3 cm; bracts and bracteoles scalelike, broadly ovate, ca. 2 mm. Flowers subsessile. Calyx cupular, ca. 2 mm, deeply divided; sepals ovate to circular, equal or unequal, purplish tuberculate abaxially, apex acute. Corolla pink or greenish white, campanulate to tubular, 3-7 mm, shallowly 5-lobed; lobes erect or reflexed, ovate-triangular, much shorter than tube, apex obtuse. Stamens inserted at throat; anthers yellow, ovate-circular; filaments very short or absent; scales oblong, fimbriate, reaching middle of tube. Ovary globose, smooth. Style 1, longer than or as long as ovary; stigma elongated. Capsule ovoid, ca. 5 mm, circumscissile near base. Seeds 1-3, brown, 2-2.5 mm, smooth. Fl. Aug, fr. Sep.

The seeds are used medicinally.

According to Kamelin (in litt.), Chinese material identified as Cuscuta japonica requires further study. Possibly two species are combined in this description; one of them may be C. engelmannii Krock, which perhaps represents the material from Xinjiang.

Although Cuscuta japonica var. fissistyla Engelmann ( = C. upcraftii Pearson) was recognized by Fang & Huang (1979), no material of this taxon was examined by the authors, and the variety is here excluded.

On herbs and shrubs. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Nei Mongol, Ningxia, Qinghai, Shaanxi, Shandong, Shanxi, Sichuan, Taiwan, Xinjiang, Yunnan, Zhejiang [Japan, Korea, Russia, Vietnam]

生活型: 草本

栽培植物: 野生

特征: 一年生缠绕草本;与菟丝子近似,但茎较粗,直径1--2毫米;花序穗状;花冠长钟形;花柱1,柱头2裂

花期: 11

生境: 见生于平地榕树上

用途: 种子入药,有补肾固精、养肝明目之效;茎活血散瘀,治扭挫伤

门中名: 种子植物门

亚门中名: 被子植物亚门

纲中名: 双子叶植物纲

中文别名: 大菟丝子


 

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