Fauna
Plant

Woolly Rock Moss

Racomitrium lanuginosum

Also known as Woolly Fringemoss, Hoary Rock-Moss, Woolly Moss

Woolly rock moss blankets exposed boulders and wind-swept alpine tundra with thick, silvery-grey carpets. Long, clear hair-points on leaf tips give dry mats a distinctly frosted, woolly appearance that traps moisture and reflects intense high-altitude sunlight. These resilient bryophytes serve as essential pioneers, stabilizing boulder scree and generating initial soil layers across northern wildernesses.

AlpinePioneer SpeciesTundra
Woolly Rock Moss reference1 / 7
(c) Henry Miller, some rights reserved (CC BY), uploaded by Henry Miller · cc-by
—observations
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Least ConcernConservation statusIUCN Red List categoriesLCNTVUENCREWEXLeast ConcernRed List categories, explained →
Key facts
Diet & preyAutotrophic
ThreatsTrampling by hikers, air pollution, climate warming
HabitatsAlpine tundra, exposed scree, lava fields, acidic rock faces
Life spanPerennial (colonies endure for decades)
Classification
  1. FamilyGrimmiaceae
  2. SpeciesRacomitrium lanuginosum
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Safe to observe at a normal distance.
Responsible observation
  • Close Inspection: Use a hand lens when mats are dry to view the tiny serrated hair-tips on each leaf.
  • Tread Lightly: Step around moss-covered rocks on high peaks, as compressed alpine mats take decades to recover.
Related species
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