Utricularia intermediaHayne

flatleaf bladderwortintermediate bladderwort

WFO wfo-0000415643 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Utricularia intermedia, photographed by Doug Suitor
fig. a Doug Suitor, CC BY 4.0 / 2021-09-29 / obs. 160962740
Utricularia intermedia, photographed by Quinten Wiegersma
fig. b Quinten Wiegersma, CC BY 4.0 / obs. 157460736
Utricularia intermedia, photographed by Tom Field
fig. c Tom Field, CC BY 4.0 / obs. 162466271
Utricularia intermedia, photographed by Allan Harris
fig. d Allan Harris, CC0 1.0 / obs. 151422918
Utricularia intermedia, photographed by Игорь Васильев
fig. e Игорь Васильев, CC BY 4.0 / obs. 143200104
Utricularia intermedia, photographed by Tero Linjama
fig. f Tero Linjama, CC0 1.0 / obs. 141854382
Utricularia intermedia, photographed by Ben Keen
fig. g Ben Keen, CC0 1.0 / obs. 137824919
Utricularia intermedia, photographed by Robert H. Wardell
fig. h Robert H. Wardell, CC0 1.0 / obs. 94951590

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 92 botanical countries

Regions where Utricularia intermedia is native: Altay, Amur, Buryatiya, China South-Central, Chita, Inner Mongolia, Irkutsk, Japan, Kamchatka, Kazakhstan, Khabarovsk, Kirgizstan, Korea, Krasnoyarsk, Kuril Is., Magadan, Manchuria, Mongolia, Primorye, Sakhalin, Tibet, Tuva, West Siberia, Yakutiya, Austria, Baltic States, Belarus, Belgium, Central European Russia, Czechia-Slovakia, Denmark, East European Russia, Finland, France, Germany, Great Britain, Ireland, Italy, Netherlands, North European Russia, Northwest European Russia, Norway, NW. Balkan Pen., Poland, Romania, South European Russia, Sweden, Switzerland, Ukraine, Alaska, Alberta, British Columbia, California, Colorado, Connecticut, Greenland, Idaho, Illinois, Indiana, Iowa, Labrador, Maine, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nevada, New Brunswick, New Hampshire, New Jersey, New York, Newfoundland, North Dakota, Northwest Territories, Nova Scotia, Nunavut, Ohio, Ontario, Oregon, Pennsylvania, Prince Edward I., Québec, Rhode I., Saskatchewan, Utah, Vermont, Washington, Wisconsin, Wyoming, Yukon AltayAmurBuryatiyaChina South-CentralChitaInner MongoliaIrkutskJapanKamchatkaKazakhstanKhabarovskKirgizstanKrasnoyarskMagadanManchuriaMongoliaPrimoryeSakhalinTibetTuvaWest SiberiaYakutiyaAustriaBaltic StatesBelarusBelgiumCentral European RussiaCzechia-SlovakiaDenmarkEast European RussiaFinlandFranceGermanyIrelandItalyNetherlandsNorth European RussiaNorthwest European RussiaNorwayNW. Balkan Pen.PolandRomaniaSouth European RussiaSwedenSwitzerlandUkraineAlaskaAlbertaBritish ColumbiaCaliforniaColoradoConnecticutGreenlandIdahoIllinoisIndianaIowaLabradorMaineManitobaMarylandMassachusettsMichiganMinnesotaMontanaNevadaNew BrunswickNew HampshireNew JerseyNew YorkNewfoundlandNorth DakotaNorthwest TerritoriesNova ScotiaNunavutOhioOntarioOregonPennsylvaniaPrince Edward I.QuébecSaskatchewanUtahVermontWashingtonWisconsinWyomingYukon KoreaRhode I.
Native distribution of Utricularia intermedia, 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
Alaska ASK NORTHERN AMERICA
Alberta ABT
British Columbia BRC
California CAL
Colorado COL
Connecticut CNT
Greenland GNL
Idaho IDA
Illinois ILL
Indiana INI
Iowa IOW
Labrador LAB
Maine MAI
Manitoba MAN
Maryland MRY
Massachusetts MAS
Michigan MIC
Minnesota MIN
Montana MNT
Nevada NEV
New Brunswick NBR
New Hampshire NWH
New Jersey NWJ
New York NWY
Newfoundland NFL
North Dakota NDA
Northwest Territories NWT
Nova Scotia NSC
Nunavut NUN
Ohio OHI
Ontario ONT
Oregon ORE
Pennsylvania PEN
Prince Edward I. PEI
Québec QUE
Rhode I. RHO
Saskatchewan SAS
Utah UTA
Vermont VER
Washington WAS
Wisconsin WIS
Wyoming WYO
Yukon YUK
Austria AUT EUROPE
Baltic States BLT
Belarus BLR
Belgium BGM
Central European Russia RUC
Czechia-Slovakia CZE
Denmark DEN
East European Russia RUE
Finland FIN
France FRA
Germany GER
Great Britain GRB
Ireland IRE
Italy ITA
Netherlands NET
North European Russia RUN
Northwest European Russia RUW
Norway NOR
NW. Balkan Pen. YUG
Poland POL
Romania ROM
South European Russia RUS
Sweden SWE
Switzerland SWI
Ukraine UKR
Altay ALT ASIA-TEMPERATE
Amur AMU
Buryatiya BRY
China South-Central CHC
Chita CTA
Inner Mongolia CHI
Irkutsk IRK
Japan JAP
Kamchatka KAM
Kazakhstan KAZ
Khabarovsk KHA
Kirgizstan KGZ
Korea KOR
Krasnoyarsk KRA
Kuril Is. KUR
Magadan MAG
Manchuria CHM
Mongolia MON
Primorye PRM
Sakhalin SAK
Tibet CHT
Tuva TVA
West Siberia WSB
Yakutiya YAK

Not drawn on the map: Kuril Is., Great Britain. We hold no public-domain boundary for these regions, so they are listed rather than guessed at.

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.

Flowering 326 in flower of 371 examined

Peak flowering in May. Each bar is the share of Utricularia intermedia observations in which someone actually recorded the reproductive state and found the plant in flower, not the raw number of flowering records. That distinction matters: people observe plants far more in spring than in winter, so a bare count of flowering records partly measures when people go outside. Dividing by the number examined removes that. 326 of 371 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 7 months have fewer than 5 examined observations, so no proportion is drawn for them. This is still a global aggregate and not a forecast for your garden: the same species flowers on different dates in different hemispheres. Where a species has fewer than 30 flowering records we do not draw this chart at all. Computed from 10.15468/dl.cgje2x.

Also published as 6 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.

  • Lentibularia intermedia (Hayne) Nieuwl. & Lunell
  • Utricularia alpina Georgi
  • Utricularia grafiana W.D.J.Koch
  • Utricularia intermedia var. terrestries Glück
  • Utricularia media Schumach.
  • Utricularia millefolia Nutt. ex Tuck.

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. Wikidata. common name (P1843), joined on the World Flora Online identifier (P7715). CC0. Retrieved 2026-07-13.
  4. 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.