North America Native Plant

Thermutis Lichen

Botanical name: Thermutis velutina

USDA symbol: THVE7

Habit: lichen

Native status: Native to North America  

Thermutis Lichen: A Mysterious Native Organism in Your Garden Have you ever noticed crusty, colorful patches growing on rocks, trees, or soil in your garden and wondered what they were? You might be looking at lichens – fascinating organisms that are neither plant nor animal, but something wonderfully in between. ...

Thermutis Lichen: A Mysterious Native Organism in Your Garden

Have you ever noticed crusty, colorful patches growing on rocks, trees, or soil in your garden and wondered what they were? You might be looking at lichens – fascinating organisms that are neither plant nor animal, but something wonderfully in between. Today, we’re diving into the world of thermutis lichen (Thermutis velutina), a native North American species that’s more mysterious than your average garden resident.

What Exactly Is Thermutis Lichen?

Before we get too deep into the specifics, let’s clear up what lichens actually are. Think of them as nature’s ultimate roommate situation – they’re composite organisms made up of a fungus and an algae (or sometimes cyanobacteria) living together in perfect harmony. The fungus provides structure and protection, while the algae whips up food through photosynthesis. It’s a partnership that’s been working for millions of years!

Thermutis velutina is a native lichen species found across North America, though specific details about its exact range and characteristics remain somewhat elusive in current botanical literature.

Is Thermutis Lichen Beneficial for Your Garden?

Here’s where lichens get really interesting from a gardener’s perspective. While you can’t exactly plant them like you would a flower or shrub, lichens can be incredibly beneficial residents in your outdoor spaces:

  • They’re excellent air quality indicators – lichens are sensitive to pollution, so their presence suggests clean air
  • They help prevent soil erosion on bare patches
  • They add natural texture and color to rock gardens and tree bark
  • They’re part of the ecosystem food web, supporting various small creatures

How to Identify Thermutis Lichen

Identifying specific lichen species can be tricky business, even for experts! Since detailed identification characteristics for Thermutis velutina aren’t widely documented, here are some general tips for lichen spotting:

  • Look for crusty, leafy, or branching growths on surfaces
  • Check rocks, tree bark, soil, and even old fences
  • Notice the colors – lichens come in amazing shades of green, gray, orange, yellow, and even bright red
  • Pay attention to texture – some are smooth, others are bumpy or have tiny cup-like structures

For precise identification of thermutis lichen or any lichen species, you’ll likely need to consult with local botanists or mycologists, as many species require microscopic examination to distinguish them properly.

Creating a Lichen-Friendly Garden

While you can’t plant lichens directly, you can certainly encourage them to make themselves at home:

  • Avoid using pesticides and chemical fertilizers, which can harm these sensitive organisms
  • Leave some natural surfaces undisturbed – old logs, rocks, and mature tree bark are lichen magnets
  • Maintain good air quality around your property
  • Be patient – lichens grow incredibly slowly, sometimes just millimeters per year

The Bottom Line on Thermutis Lichen

Thermutis lichen represents the quiet, often overlooked diversity that makes our native ecosystems so rich and complex. While we may not have all the details about this particular species, its presence as a native organism means it’s playing an important role in the local environment.

Rather than trying to remove lichens from your garden, consider them free, low-maintenance additions that connect your space to the broader web of native life. They’re living proof that some of the most interesting garden residents are the ones that choose you, rather than the ones you choose!

Next time you’re wandering through your garden, take a moment to appreciate these ancient partnerships quietly doing their thing on a rock or tree near you. Who knows? You might just spot thermutis lichen adding its own subtle beauty to your outdoor space.

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

Thermutis velutina (Ach.) Flotow - thermutis lichen

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