
Swollen-spurred Bladderwort
Utricularia gibba
**Swollen-spurred Bladderwort (Utricularia gibba)** The Swollen-spurred Bladderwort is a small carnivorous aquatic plant characterized by thread-like stems bearing tiny bladder traps and distinctive yellow flowers with inflated spurs. These microscopic bladders create suction to capture small aquatic organisms including water fleas, mosquito larvae, and protozoans.
114
Countries
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Utricularia_gibba
Taxonomy & Classification
Kingdom
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Lamiales
Family
Lentibulariaceae
Genus
Utricularia
Swollen-spurred Bladderwort belongs to the family Lentibulariaceae, order Lamiales, within the Magnoliopsida class.
Species Profile
**Swollen-spurred Bladderwort (Utricularia gibba)** The Swollen-spurred Bladderwort is a small carnivorous aquatic plant characterized by thread-like stems bearing tiny bladder traps and distinctive yellow flowers with inflated spurs. These microscopic bladders create suction to capture small aquatic organisms including water fleas, mosquito larvae, and protozoans. The plant plays a dual ecological role as both predator of microorganisms and primary producer, contributing to nutrient cycling in aquatic ecosystems. This species demonstrates remarkable global distribution, occurring across six continents in freshwater and occasionally terrestrial habitats. It inhabits shallow ponds, marshes, rice paddies, temporary pools, and slow-moving waterways from tropical to temperate regions, showing exceptional adaptability to diverse environmental conditions. Despite its widespread distribution, U. gibba is classified as Critically Endangered, though specific threats remain unassessed. The extensive geographic range suggests potential confusion with closely related species or significant population declines across its native range. Habitat destruction through wetland drainage, agricultural intensification, and urban development likely represents primary threats. Water pollution and altered hydrology from dam construction may further impact populations. Current conservation measures for this species are not well-documented, reflecting limited research attention despite its critical status. The contradiction between its apparently cosmopolitan distribution and endangered classification indicates urgent need for taxonomic clarification and population assessments. The outlook remains uncertain due to insufficient population data and threat assessment. Comprehensive surveys are needed to determine whether this represents a genuinely widespread but declining species or a complex of closely related taxa requiring separate conservation strategies.
Swollen-spurred Bladderwort faces severe decline primarily due to habitat destruction and degradation of its specialized aquatic environments. Wetland drainage, water pollution, and invasive species competition have significantly reduced suitable habitat availability across its range.
Key Facts
Habitat & Distribution
Threats
IUCN Red List: Critically Endangered
Swollen-spurred Bladderwort faces severe decline primarily due to habitat destruction and degradation of its specialized aquatic environments. Wetland drainage, water pollution, and invasive species competition have significantly reduced suitable habitat availability across its range.
Agricultural runoff and chemical contamination
Water pollution and eutrophication
Wetland drainage and habitat destruction
Climate change affecting water levels
Invasive aquatic plant competition
Found in 114 Countries
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (CR).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | NTNear Threatened | CRCritically Endangered | Lower local risk |
| EU | NTNear Threatened | CRCritically Endangered | Lower local risk |
National Red List data sourced from the National Red List Project (nationalredlist.org, ZSL) and country-specific Red List authorities.
Community Sightings
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Sources & Attribution
How to Cite
IUCN: IUCN (2025). The IUCN Red List of Threatened Species. Version 2025-1. Available at: https://www.iucnredlist.org. doi:10.2305/IUCN.UK.2025-1.RLTS
GBIF: GBIF.org (2025). GBIF Home Page. Available at: https://www.gbif.org
National Red Lists: ZSL (2025). National Red List. Zoological Society of London. Available at: https://www.nationalredlist.org
This page: SpeciesRadar (2025). Swollen-spurred Bladderwort (Utricularia gibba). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/swollen-spurred-bladderwort