North America Native Plant

Mountain Clauzadea Lichen

Botanical name: Clauzadea monticola

USDA symbol: CLMO9

Habit: lichen

Native status: Native to North America  

Synonyms: Lecidea monticola Ach. (LEMO13)  ⚘  Protoblastenia monticola (Ach.) J. Steiner (PRMO3)   

Mountain Clauzadea Lichen: A Tiny Rocky Mountain Resident If you’ve ever hiked through mountainous terrain and noticed small, pale patches decorating the rock faces, you might have encountered the mountain clauzadea lichen! This fascinating little organism, scientifically known as Clauzadea monticola, is one of nature’s most remarkable partnerships – and ...

Mountain Clauzadea Lichen: A Tiny Rocky Mountain Resident

If you’ve ever hiked through mountainous terrain and noticed small, pale patches decorating the rock faces, you might have encountered the mountain clauzadea lichen! This fascinating little organism, scientifically known as Clauzadea monticola, is one of nature’s most remarkable partnerships – and it’s been quietly thriving in North America’s rocky landscapes long before any of us started thinking about native gardening.

What Exactly Is Mountain Clauzadea Lichen?

First things first – mountain clauzadea lichen isn’t a plant at all! It’s actually a lichen, which is a unique partnership between a fungus and algae (or sometimes cyanobacteria) living together in perfect harmony. Think of it as nature’s original roommate situation, where both partners benefit from the arrangement. The fungus provides structure and protection, while the algae produces food through photosynthesis.

You might also see this species listed under its older scientific names, including Lecidea monticola or Protoblastenia monticola, but Clauzadea monticola is the current accepted name.

Where You’ll Find This Rocky Resident

Mountain clauzadea lichen is native to North America and, as its name suggests, has a particular fondness for mountainous regions. It typically makes its home on rock surfaces at higher elevations, where the air is clean and the conditions are just right for this slow-growing organism to thrive.

Spotting Mountain Clauzadea in the Wild

Identifying mountain clauzadea lichen is all about knowing what to look for:

  • Forms small, crusty patches on rock surfaces
  • Pale gray to whitish in color
  • Creates thin, somewhat smooth-textured crusts
  • Typically found on exposed rock faces in mountainous areas
  • Prefers locations with good air quality

Is It Beneficial to Have Around?

While you can’t exactly plant mountain clauzadea lichen in your garden (and trust us, it wouldn’t be happy there anyway!), it plays several important ecological roles:

  • Rock breakdown: Like many lichens, it slowly breaks down rock surfaces, contributing to soil formation over very long periods
  • Ecosystem indicator: Its presence often indicates good air quality, as many lichens are sensitive to air pollution
  • Biodiversity support: Contributes to the complex web of life in rocky mountain ecosystems
  • Erosion prevention: Helps stabilize rock surfaces and prevent excessive weathering

Why You Won’t Find It in Garden Centers

Unlike the flowering natives we typically recommend for garden use, mountain clauzadea lichen has very specific requirements that make it impossible to cultivate:

  • Requires specific rock substrates
  • Needs particular climatic conditions found at higher elevations
  • Grows extremely slowly (we’re talking decades!)
  • Cannot survive transplantation or garden conditions

Appreciating Nature’s Original Partnership

While mountain clauzadea lichen won’t be making an appearance in your native plant garden, it’s worth appreciating this remarkable organism the next time you encounter it in the wild. As a true North American native, it represents millions of years of successful adaptation to our continent’s diverse landscapes.

If you’re interested in supporting native biodiversity in your garden, consider focusing on native flowering plants, grasses, and shrubs that can actually thrive in cultivated settings. These plants will provide the pollinator support and wildlife habitat that lichens, fascinating as they are, simply cannot offer.

So the next time you’re hiking through rocky mountain terrain, take a moment to appreciate these tiny crusty patches. They may not be much to look at, but they’re living proof that some of nature’s most successful partnerships come in the smallest packages!

Mountain Clauzadea Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Porpidiaceae Hertel & Hafellner

Genus

Clauzadea Hafellner & Bellem. - clauzadea lichen

Species

Clauzadea monticola (Ach.) Hafellner & Bellem. - mountain clauzadea lichen

Plant data source: USDA, NRCS 2025. The PLANTS Database. https://plants.usda.gov,. 2/25/2025. National Plant Data Team, Greensboro, NC USA