Cut Notchwort
Tritomaria exsecta
Cut Notchwort (Tritomaria exsecta) is a small leafy liverwort characterized by its distinctive deeply notched leaves that give the species its common name. This bryophyte forms small, dark green to brownish patches and plays an important ecological role in nutrient cycling and moisture retention in specialized microhabitats.
Photo: iNaturalist: (c) wolff christiane, some rights reserved (CC BY-NC), uploaded by wolff christiane
Taxonomy & Classification
Kingdom
Plantae
Phylum
Marchantiophyta
Class
Jungermanniopsida
Order
Jungermanniales
Family
Lophoziaceae
Genus
Tritomaria
Cut Notchwort belongs to the family Lophoziaceae, order Jungermanniales, within the Jungermanniopsida class.
Species Profile
Cut Notchwort (Tritomaria exsecta) is a small leafy liverwort characterized by its distinctive deeply notched leaves that give the species its common name. This bryophyte forms small, dark green to brownish patches and plays an important ecological role in nutrient cycling and moisture retention in specialized microhabitats.
Cut Notchwort (Tritomaria exsecta) is declining primarily due to habitat loss and degradation of its specialized bryophyte communities. Climate change and atmospheric pollution are altering the delicate moisture and chemical conditions required for this liverwort's survival, while human activities continue to fragment and destroy suitable habitats.
Key Facts
Habitat & Distribution
Cut Notchwort grows exclusively on acidic rock surfaces, particularly on exposed siliceous outcrops, cliff faces, and boulder fields in montane and subalpine regions. It requires consistently moist conditions with high humidity and clean air, typically found in areas with frequent fog or mist.
Threats
IUCN Red List: Endangered
Cut Notchwort (Tritomaria exsecta) is declining primarily due to habitat loss and degradation of its specialized bryophyte communities. Climate change and atmospheric pollution are altering the delicate moisture and chemical conditions required for this liverwort's survival, while human activities continue to fragment and destroy suitable habitats.
Climate change and altered precipitation patterns
Habitat loss and fragmentation
Atmospheric pollution and acid deposition
Changes in forest management practices
Competition from invasive bryophyte species
National vs Global Threat Status
How this species is assessed at the national level compared to its IUCN global status (EN).
| Country | National Status | Global Status | Comparison |
|---|---|---|---|
| EU | LCLeast Concern | ENEndangered | Lower local risk |
| EU | LCLeast Concern | ENEndangered | 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). Cut Notchwort (Tritomaria exsecta). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/cut-notchwort