Dwarf Haircap
Pogonatum nanum
Photo: iNaturalist: (c) Rafael Medina, some rights reserved (CC BY), uploaded by Rafael Medina
Overview
Dwarf Haircap is a small moss species characterized by its distinctive hair-like structures (calyptra) that cover the developing spore capsules, giving it its common name. This diminutive bryophyte forms low, dense cushions or mats with narrow, pointed leaves arranged in a spiral pattern around short stems. As a pioneer species, it plays a crucial role in soil stabilization and provides microhabitat for invertebrates while contributing to nutrient cycling in early successional ecosystems.
Dwarf Haircap moss faces significant threats from habitat degradation and loss due to human activities and environmental changes. Its specialized habitat requirements make it particularly vulnerable to disturbances that alter soil conditions, moisture levels, and microclimate stability in its terrestrial environments.
Habitat
Dwarf Haircap moss typically occurs on disturbed soils, sandy or clay substrates, path edges, and open ground in various terrestrial environments. It favors areas with moderate moisture levels and can be found on banks, roadsides, and other exposed soil surfaces where competition from other vegetation is limited.
Other threatened species in Polytrichaceae
Threatened in Åland Islands
Frequently asked questions
Why is Dwarf Haircap classified as Vulnerable?
Where does Dwarf Haircap live?
What are the main threats to Dwarf Haircap?
Get weekly conservation intelligence
One short digest a week of the most striking species and country data we ship, plus breaking conservation news paired with our database where it matters.
Free, no spam. One-click unsubscribe in every email.