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(First upload on May 24 2012. Last on August 11 2023) [ 日本語 | English ]

Caltha L. (リュウキンカ) C. palustris L., marsh marigold or kingcup Lifeform: perennial forb var. nipponica H. Hara (リュウキンカ): Korea - Japan (Honshu and Kyushu) var. pygmaea Makino (コバノリュウキンカ): extremely small var. enkoso H. Hara (エンコウソウ) Lifeform: stems are assurgent and then lie on the ground → roots initiationg from the stems Distribution: Sakhalin - Japan (Honshu and Hokkaido) - Kuril Habitat: mountains and wetlands Stem: 50 cm tall

var. barthei Hance (Ezonoryukinka, エゾノリュウキンカ, 蝦夷立金花) Distribution: Kuriles - northern Japan - Sakhalin - northern Korea - Ussuri Habitat: wetlands, such as streamsides Field training on integrated environmental research (統合環境調査法実習) (出現種リスト) ⇒ Jomon Forest 縄文の森 Stem: 50-80 cm tall Synonyms Caltha fistulosa Schipcz., Caltha barthei (Hance) Koidz., Caltha palustris L. ssp. barthei (Hance) Kitam., Caltha silvestris Vorosch. f. attrorubra (W. T. Wang) W. T. Wang, red flower in northwestern Sichuan

China var. sibirica Regel (カラフトリュウキンカ) var. umbrosa Diels

Caltha palustris in Hokkaido

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var. barthei

1 2 3
4 5
[1/2] at Otokoyama Nature Park (Mt. Tosshouzan 突哨山, 243 m a.l.s.), Asahikawa, on May 5 2012. [3] at a boardwalk near Sarobetsu Wetland Center, northern Hokkaoido, on May 21 2014. [4] along a walkboard in a post-mined peatland near Sarobetsu Visitor Center, northern Hokkaido, on April 23 2016. [5] along a trail in Utasai Forest Park, southern Hokkaido, on April 20 2023. Records: at Teine Miyaginosawa (宮城の沢)on May 7 1980

var. sibirica (カラフトリュウキンカ)

1 2 3
[1-3] in Sandaohu peatland, Jilin Province, northeastern China, on June 11 2017.