Bog Pouchwort
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Bog Pouchwort

Calypogeia sphagnicola

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Photo: iNaturalist: (c) John D Reynolds, some rights reserved (CC BY-NC), uploaded by John D Reynolds

Overview

Bog Pouchwort is a small, delicate liverwort that forms thin, creeping mats with distinctive pouch-like structures (perianths) that house its reproductive organs. This diminutive bryophyte displays pale green to yellowish-green coloration and grows as flattened, leafy shoots typically measuring only a few centimeters in length. As a specialized bog species, it plays a crucial role in peat bog ecosystems by contributing to the complex mat of bryophytes that help maintain the unique hydrology and chemistry of these wetland habitats.

Bog Pouchwort (Calypogeia sphagnicola) is critically endangered primarily due to habitat loss and degradation of its specialized bog and wetland environments. The species is highly dependent on pristine sphagnum bog ecosystems, which are increasingly threatened by drainage, peat extraction, agricultural conversion, and climate change-induced drying.

Threat summary

Habitat

Bog Pouchwort inhabits acidic Sphagnum bogs and wet heathlands, where it grows among cushions of Sphagnum moss in permanently waterlogged, nutrient-poor conditions. This species is typically found in the wettest areas of ombrotrophic bogs, often in shallow pools or along bog margins where the water table remains consistently at or near the surface.

Frequently asked questions

Why is Bog Pouchwort classified as Critically Endangered?
Bog Pouchwort is classified as Critically Endangered — facing an extremely high risk of extinction in the wild — because population sizes are very small, declining sharply, or restricted to a tiny range. Bog Pouchwort (Calypogeia sphagnicola) is critically endangered primarily due to habitat loss and degradation of its specialized bog and wetland environments. The species is highly dependent on pristine sphagnum bog ecosystems, which are increasingly threatened by drainage, peat extraction, agricultural conversion, and climate change-induced drying.
Where does Bog Pouchwort live?
Bog Pouchwort occurs in Åland Islands, Argentina, Australia, Austria, Belarus, and Belgium (plus 27 other countries). Country-level distribution data is sourced from the IUCN Red List and cross-referenced with GBIF occurrences.
What are the main threats to Bog Pouchwort?
The main threats to Bog Pouchwort 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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