Thacla natans(Pall.) Deyl & Soják

WFO wfo-0001129275 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Thacla natans, photographed by Mary Krieger
fig. a Mary Krieger, CC BY 4.0 / 2021-06-28 / obs. 139734092
Thacla natans, photographed by Matt Bowser
fig. b Matt Bowser, CC BY 4.0 / obs. 94528583
Thacla natans, photographed by Matt Bowser
fig. c Matt Bowser, CC BY 4.0 / obs. 91865245
Thacla natans, photographed by Allan Harris
fig. d Allan Harris, CC0 1.0 / obs. 24781342
Thacla natans, photographed by Allan Harris
fig. e Allan Harris, CC0 1.0 / obs. 24782523
Thacla natans, photographed by Allan Harris
fig. f Allan Harris, CC0 1.0 / obs. 24750476
Thacla natans, photographed by Rose Zappa
fig. g Rose Zappa, CC BY 4.0 / obs. 10137410
Thacla natans, photographed by lallen
fig. h lallen, CC0 1.0 / obs. 162909396

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Native range 27 botanical countries

Regions where Thacla natans is native: Amur, Buryatiya, Chita, Inner Mongolia, Irkutsk, Kamchatka, Khabarovsk, Korea, Krasnoyarsk, Magadan, Manchuria, Mongolia, Primorye, Tuva, West Siberia, Yakutiya, East European Russia, Alaska, Alberta, British Columbia, Manitoba, Minnesota, Northwest Territories, Ontario, Saskatchewan, Wisconsin, Yukon AmurBuryatiyaChitaInner MongoliaIrkutskKamchatkaKhabarovskKrasnoyarskMagadanManchuriaMongoliaPrimoryeTuvaWest SiberiaYakutiyaEast European RussiaAlaskaAlbertaBritish ColumbiaManitobaMinnesotaNorthwest TerritoriesOntarioSaskatchewanWisconsinYukon Korea
Native distribution of Thacla natans, after Kew’s World Checklist of Vascular Plants. Introduced, extinct and doubtful records are excluded, so this is where the plant is from, not everywhere it now grows. Regions too small to draw at this scale are marked with a dot.
RegionTDWG codeContinent
Amur AMU ASIA-TEMPERATE
Buryatiya BRY
Chita CTA
Inner Mongolia CHI
Irkutsk IRK
Kamchatka KAM
Khabarovsk KHA
Korea KOR
Krasnoyarsk KRA
Magadan MAG
Manchuria CHM
Mongolia MON
Primorye PRM
Tuva TVA
West Siberia WSB
Yakutiya YAK
Alaska ASK NORTHERN AMERICA
Alberta ABT
British Columbia BRC
Manitoba MAN
Minnesota MIN
Northwest Territories NWT
Ontario ONT
Saskatchewan SAS
Wisconsin WIS
Yukon YUK
East European Russia RUE EUROPE

Region boundaries approximated from Natural Earth (public domain) and mapped to TDWG World Geographical Scheme for Recording Plant Distributions (WGSRPD) level-3 botanical countries (Brummitt 2001). Indicative, not the official WGSRPD geometry.

Also published as 4 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Caltha baicalensis Demid. ex Steud.
  • Caltha natans Pall.
  • Caltha pusilla Herb.Lamb. ex Pursh
  • Thacla ficarioides Spach

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.
  3. Kew, World Checklist of Vascular Plants (WCVP v16). native distribution by TDWG level-3 botanical country, and life form. CC BY 3.0. Retrieved 2026-06-04.

We publish what we can source and we say so when we cannot. This page has no care advice and no toxicity claim, because we do not yet have those from a source we can cite.