Hieracium pachycalamum
Local name: grovstjälkig fibbla
Grovstjälkig fibbla (Hieracium pachycalamum) is a perennial herbaceous plant in the hawkweed family, characterized by its notably thick, robust stems and yellow composite flower heads typical of the genus. This rare Nordic endemic produces distinctive basal rosettes of hairy leaves and serves as a specialized pollinator resource for local alpine insects during its brief flowering period.
Taxonomy & Classification
Kingdom
Plantae
Phylum
Tracheophyta
Class
Magnoliopsida
Order
Asterales
Family
Asteraceae
Genus
Hieracium
Hieracium pachycalamum belongs to the family Asteraceae, order Asterales, within the Magnoliopsida class.
Species Profile
Grovstjälkig fibbla (Hieracium pachycalamum) is a perennial herbaceous plant in the hawkweed family, characterized by its notably thick, robust stems and yellow composite flower heads typical of the genus. This rare Nordic endemic produces distinctive basal rosettes of hairy leaves and serves as a specialized pollinator resource for local alpine insects during its brief flowering period.
Hieracium pachycalamum is critically endangered due to its extremely limited distribution and small population size, making it highly vulnerable to habitat loss and environmental changes. The species faces ongoing threats from human activities and natural factors that could easily drive it to extinction given its restricted range.
Key Facts
Habitat & Distribution
Grovstjälkig fibbla occupies specific microhabitats on calcareous rock ledges and crevices in subalpine and alpine zones, typically between 800-1400 meters elevation. The species requires well-drained, mineral-rich soils with partial shade provided by surrounding cliff faces or scattered shrub vegetation.
Threats
IUCN Red List: Critically Endangered
Hieracium pachycalamum is critically endangered due to its extremely limited distribution and small population size, making it highly vulnerable to habitat loss and environmental changes. The species faces ongoing threats from human activities and natural factors that could easily drive it to extinction given its restricted range.
Extremely limited distribution and small population size
Habitat degradation and loss
Climate change impacts on specialized habitat
Human disturbance and development pressure
Potential genetic bottlenecks due to small population
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
This page: SpeciesRadar (2025). Hieracium pachycalamum (Hieracium pachycalamum). SpeciesRadar: Intelligence for Earth's Biodiversity. Available at: https://speciesradar.org/species/grovstjalkig-fibbla