Common Kettlewort
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Common Kettlewort

Blasia pusilla

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Photo: Wikimedia Commons (CC) via https://en.wikipedia.org/wiki/Blasia

Overview

Blasia pusilla is the only species in the liverwort genus Blasia. This species establishes a symbiosis with nitrogen-fixing cyanobacteria of the genus Nostoc, which are housed in special cavities, called auricles, occurring on the ventral (underside) surface of the thallus.

Common Kettlewort (Blasia pusilla) is declining primarily due to habitat loss and degradation of its specialized wetland environments. The species is particularly vulnerable to drainage of wet areas, pollution, and changes in water chemistry that affect the bryophyte communities it depends on.

Threat summary

Frequently asked questions

Why is Common Kettlewort classified as Endangered?
Common Kettlewort is classified as Endangered — facing a very high risk of extinction in the wild — because population numbers are declining steeply and key habitats are under sustained pressure. Common Kettlewort (Blasia pusilla) is declining primarily due to habitat loss and degradation of its specialized wetland environments. The species is particularly vulnerable to drainage of wet areas, pollution, and changes in water chemistry that affect the bryophyte communities it depends on.
Where does Common Kettlewort live?
Common Kettlewort occurs in across multiple regions. Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Common Kettlewort?
The main threats to Common Kettlewort are ai-1, ai-2, ai-3, and ai-4. The full IUCN-classified threat record for this species is detailed on the species page.

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