North America Native Plant

Thermutis Lichen

Botanical name: Thermutis

USDA symbol: THERM2

Habit: lichen

Native status: Native to North America  

Thermutis Lichen: A Mysterious Native Symbiont in Your Garden If you’ve stumbled across the term thermutis lichen while exploring native species, you’ve discovered one of nature’s more enigmatic organisms. Lichens like Thermutis represent a fascinating partnership between fungi and algae, creating unique living entities that are neither fully plant nor ...

Thermutis Lichen: A Mysterious Native Symbiont in Your Garden

If you’ve stumbled across the term thermutis lichen while exploring native species, you’ve discovered one of nature’s more enigmatic organisms. Lichens like Thermutis represent a fascinating partnership between fungi and algae, creating unique living entities that are neither fully plant nor fungus.

What Exactly Is Thermutis Lichen?

Thermutis is a lichen genus native to North America, though specific details about this particular group remain somewhat mysterious in the scientific community. Like all lichens, Thermutis represents a symbiotic relationship where fungi and algae work together to create something entirely new—a composite organism that can survive in conditions where neither partner could thrive alone.

Where You Might Find Thermutis

As a North American native, Thermutis lichen contributes to our continent’s rich biodiversity, though its exact geographical distribution isn’t well-documented in readily available sources. This speaks to the often-overlooked nature of many lichen species, despite their ecological importance.

Is Thermutis Beneficial to Your Garden?

While we may not have extensive research on this specific lichen genus, lichens in general are incredible garden allies. Here’s why you should appreciate any lichens that naturally appear in your landscape:

  • They indicate good air quality—lichens are sensitive to pollution
  • They don’t harm trees or other plants they grow on
  • They contribute to the ecosystem’s biodiversity
  • They can add subtle texture and interest to bark, rocks, and soil
  • They help with soil formation over time

How to Identify Lichens in Your Garden

Since specific identification characteristics for Thermutis aren’t well-documented, here are general tips for recognizing lichens in your outdoor space:

  • Look for crusty, leafy, or branching growths on tree bark, rocks, or soil
  • Notice colors ranging from gray-green to bright orange, yellow, or white
  • Observe their slow growth patterns—they’re not in a hurry!
  • Check that they’re firmly attached but not penetrating their substrate

Should You Encourage Lichens?

The short answer is yes! If lichens like Thermutis appear naturally in your garden, consider it a good sign. You don’t need to actively cultivate them—in fact, you can’t really plant lichens in the traditional sense. Instead, create conditions they love:

  • Maintain good air quality around your property
  • Avoid using harsh chemicals or fungicides
  • Leave natural surfaces like tree bark and rocks undisturbed
  • Be patient—lichens grow very slowly

The Bottom Line on Thermutis Lichen

While Thermutis remains somewhat of a mystery in terms of specific characteristics, it represents the incredible diversity of native lichens that quietly contribute to our ecosystems. Rather than trying to control or eliminate lichens, embrace them as signs of a healthy, balanced garden environment. These remarkable organisms have been around for millions of years, and they’re perfectly capable of taking care of themselves—they just need us to give them space to exist.

Next time you’re wandering through your garden, take a moment to appreciate any lichens you spot. Whether it’s Thermutis or another native species, you’re looking at one of nature’s most successful partnerships in action.

Thermutis Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lichinales

Family

Lichinaceae Nyl.

Genus

Thermutis Fr. - thermutis lichen

Species

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