Wrinkle-seed Pygmyweed
Crassula aquatica
Conservation status data sourced from the IUCN Red List of Threatened Species.
47
Countries
Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Crassula_aquatica
Taxonomy & Classification
Kingdom
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Saxifragales
Family
Crassulaceae
Genus
Crassula
Wrinkle-seed Pygmyweed belongs to the family Crassulaceae, order Saxifragales, within the Magnoliopsida class.
Species Profile
Species profile data sourced from the IUCN Red List of Threatened Species.
Wrinkle-seed Pygmyweed faces severe threats from habitat loss due to wetland drainage, agricultural conversion, and urban development of its specialized aquatic environments. Climate change and altered hydrological patterns further threaten the ephemeral pools and shallow water bodies this species depends upon for survival.
Key Facts
Habitat & Distribution
Shallow freshwater pools, pond margins, muddy shores of lakes and rivers, and seasonally flooded areas with exposed mineral substrates. The species typically occurs in ephemeral wetlands and disturbed aquatic habitats from lowland to montane elevations.
Threats
IUCN Red List: Critically Endangered
Wrinkle-seed Pygmyweed faces severe threats from habitat loss due to wetland drainage, agricultural conversion, and urban development of its specialized aquatic environments. Climate change and altered hydrological patterns further threaten the ephemeral pools and shallow water bodies this species depends upon for survival.
Agricultural intensification
Climate change and altered precipitation patterns
Urban development and infrastructure
Wetland drainage and conversion
Water pollution and eutrophication
Found in 47 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 | DDData Deficient | CRCritically Endangered | Lower local risk |
| EU | DDData Deficient | 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). Wrinkle-seed Pygmyweed (Crassula aquatica). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/wrinkle-seed-pygmyweed