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(First upload on February 19 2016. Last on August 31 2023) [ 日本語 | English ]

Hydrocotyle L. (チドメグサ), water pennywort Chidomegusa (チドメグサ, 血止草), lawn pennywort, lawn marshpennywort or lawn water-pennywort Lifeform: weedy, stoloniferous, evergreen, perennial forb Distribution: Japan (except Hokkaido) - Korea - China - Australia - Africa Habitat: sunny and mesic sites (roadsides, grasslands, forests, etc.) Flower stalk: shorter than leaf Chromosome number: 2n = 24

Use: medicine (Chidome = blood stanching) Synonyms: Varieties when established (usually treated as distinct species) var. dichondroides (Makino) M. Hiroe (ケチドメグサ) ✂ var. pauciflora (Y. Yabe) T. Yamaz. (ヒメチドメ) ✂ var. tuberifera (Ohwi) T. Yamaz. (オキナワチドメグサ) ✂ var. batrachium (Hance) Hand.-Mazz. ex R. H. Shan (タカサゴノチドメ) ✂

Hydrocotyle sibthorpioides in Japan

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[1-3] in Oi Pier Seaside Park, Tokyo, on December 26 2015. [4-6] at the entrance of Mount Mihara, Izu-Osihama Island in Izu Islands, Tokyo, on June 7 2023.