North America Native Plant

Thelocarpon Lichen

Botanical name: Thelocarpon superellum

USDA symbol: THSU5

Habit: lichen

Native status: Native to North America  

Thelocarpon Lichen: A Mysterious Native You Might Never See Have you ever wondered about the tiny, often overlooked organisms quietly living their lives in North America’s wild spaces? Meet the thelocarpon lichen (Thelocarpon superellum), one of nature’s more elusive residents that most gardeners will never encounter – and that’s perfectly ...

Thelocarpon Lichen: A Mysterious Native You Might Never See

Have you ever wondered about the tiny, often overlooked organisms quietly living their lives in North America’s wild spaces? Meet the thelocarpon lichen (Thelocarpon superellum), one of nature’s more elusive residents that most gardeners will never encounter – and that’s perfectly okay!

What Exactly Is Thelocarpon Lichen?

Before we dive in, let’s clear up what we’re dealing with here. Despite its name suggesting it’s a plant, thelocarpon lichen is actually a lichen – a fascinating partnership between fungi and algae working together as one organism. Think of it as nature’s ultimate roommate situation, where both parties benefit from the arrangement.

Thelocarpon superellum is native to North America, making it a true homegrown species. However, this little guy is quite the mystery in the lichen world, with very limited information available about its specific habits and preferences.

Where Does It Call Home?

The geographical distribution of thelocarpon lichen remains largely unknown, which tells us something important: this is likely a rare or very specialized species that doesn’t pop up just anywhere. It’s one of those needle in a haystack organisms that scientists are still working to understand.

Is It Beneficial for Your Garden?

Here’s where things get interesting – and a bit unconventional. Unlike traditional garden plants, you can’t exactly plant thelocarpon lichen in your backyard. Lichens like this one establish themselves naturally when conditions are just right, and those conditions are often very specific and difficult to replicate.

However, if you’re lucky enough to spot any lichens in your garden space, consider them a good sign! Lichens are often indicators of clean air and stable environmental conditions.

How to Identify Thelocarpon Lichen

Unfortunately, identifying thelocarpon lichen is tricky business, even for experts. With limited documentation and its apparent rarity, positive identification typically requires:

  • Microscopic examination
  • Chemical testing
  • Expert knowledge of lichen taxonomy
  • Specialized field guides

If you think you’ve spotted something that might be this lichen, your best bet is to contact local botanists, mycologists, or university extension services for proper identification.

The Bottom Line for Gardeners

While thelocarpon lichen isn’t something you’ll be adding to your shopping list at the garden center, it represents the incredible diversity of North American native species. Its mysterious nature reminds us that there’s still so much we don’t know about the organisms sharing our continent.

Instead of focusing on this particular lichen, consider creating garden conditions that welcome the many lichen species that might naturally establish themselves in your space. Avoid using chemicals, maintain some wild or undisturbed areas, and appreciate the small wonders that might appear on their own timeline.

Sometimes the best gardening advice is simply: leave room for mystery and let nature surprise you!

Thelocarpon Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Acarosporaceae Zahlbr.

Genus

Thelocarpon Nyl. ex Hue - thelocarpon lichen

Species

Thelocarpon superellum Nyl. - thelocarpon lichen

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