Utricularia cornutaMichx.

horned bladderwort

WFO wfo-0000415750 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h · 8 separate observations

Utricularia cornuta, photographed by Leila Dasher
fig. a Leila Dasher, CC BY 4.0 / 2022-06-11 / obs. 205484824
Utricularia cornuta, photographed by Joseph Aubert
fig. b Joseph Aubert, CC BY 4.0 / obs. 204556892
Utricularia cornuta, photographed by Stephanie C
fig. c Stephanie C, CC0 1.0 / obs. 193260954
Utricularia cornuta, photographed by danbanks
fig. d danbanks, CC0 1.0 / obs. 146364098
Utricularia cornuta, photographed by er-birds
fig. e er-birds, CC BY 4.0 / obs. 147077787
Utricularia cornuta, photographed by Derek
fig. f Derek, CC BY 4.0 / obs. 143202867
Utricularia cornuta, photographed by er-birds
fig. g er-birds, CC BY 4.0 / obs. 141487633
Utricularia cornuta, photographed by Reuven Martin
fig. h Reuven Martin, CC0 1.0 / obs. 140999828

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 43 botanical countries

Regions where Utricularia cornuta is native: Alabama, Alberta, Arkansas, Connecticut, Delaware, District of Columbia, Florida, Georgia, Illinois, Indiana, Kentucky, Labrador, Louisiana, Maine, Manitoba, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, New Brunswick, New Hampshire, New Jersey, New York, Newfoundland, North Carolina, Nova Scotia, Ohio, Ontario, Pennsylvania, Québec, Rhode I., Saskatchewan, South Carolina, Tennessee, Texas, Vermont, Virginia, West Virginia, Wisconsin, Bahamas, Brazil Northeast, Cuba AlabamaAlbertaArkansasConnecticutFloridaGeorgiaIllinoisIndianaKentuckyLabradorLouisianaMaineManitobaMarylandMassachusettsMichiganMinnesotaMississippiNew BrunswickNew HampshireNew JerseyNew YorkNewfoundlandNorth CarolinaNova ScotiaOhioOntarioPennsylvaniaQuébecSaskatchewanSouth CarolinaTennesseeTexasVermontVirginiaWest VirginiaWisconsinBrazil NortheastCuba DelawareDistrict of ColumbiaRhode I.Bahamas
Native distribution of Utricularia cornuta, 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
Alabama ALA NORTHERN AMERICA
Alberta ABT
Arkansas ARK
Connecticut CNT
Delaware DEL
District of Columbia WDC
Florida FLA
Georgia GEO
Illinois ILL
Indiana INI
Kentucky KTY
Labrador LAB
Louisiana LOU
Maine MAI
Manitoba MAN
Maryland MRY
Massachusetts MAS
Michigan MIC
Minnesota MIN
Mississippi MSI
New Brunswick NBR
New Hampshire NWH
New Jersey NWJ
New York NWY
Newfoundland NFL
North Carolina NCA
Nova Scotia NSC
Ohio OHI
Ontario ONT
Pennsylvania PEN
Québec QUE
Rhode I. RHO
Saskatchewan SAS
South Carolina SCA
Tennessee TEN
Texas TEX
Vermont VER
Virginia VRG
West Virginia WVA
Wisconsin WIS
Bahamas BAH SOUTHERN AMERICA
Brazil Northeast BZE
Cuba CUB

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 947 in flower of 967 examined

Peak flowering in Mar. Each bar is the share of Utricularia cornuta 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. 947 of 967 examined observations were in flower, every one of them research grade. The whisker on each bar is a 95% Wilson interval. 2 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 1 synonym

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.

  • Stomoisia cornuta (Michx.) Raf.

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.