North America Native Plant

Mycomicrothelia Lichen

Botanical name: Mycomicrothelia subfallens

USDA symbol: MYSU2

Habit: lichen

Native status: Native to North America  

Mycomicrothelia Lichen: A Mysterious North American Native Ever stumbled across something in your garden that made you scratch your head and wonder, What in the world is that? Well, if you’ve encountered mycomicrothelia lichen (Mycomicrothelia subfallens), you’re not alone in your curiosity. This native North American lichen is one of ...

Mycomicrothelia Lichen: A Mysterious North American Native

Ever stumbled across something in your garden that made you scratch your head and wonder, What in the world is that? Well, if you’ve encountered mycomicrothelia lichen (Mycomicrothelia subfallens), you’re not alone in your curiosity. This native North American lichen is one of nature’s more elusive characters, and honestly, there’s still a lot we don’t know about it!

What Exactly Is Mycomicrothelia Lichen?

First things first – let’s clear up what we’re dealing with here. Mycomicrothelia lichen isn’t a plant in the traditional sense. Lichens are fascinating organisms that are actually a partnership between fungi and algae (and sometimes bacteria too!). Think of them as nature’s ultimate roommates, working together to survive in places where neither could make it alone.

This particular lichen species calls North America home, though the exact details of where you might find it remain somewhat of a mystery. Like many lichens, it’s probably more common than we realize – we just haven’t been paying close enough attention!

Is This Lichen Good for Your Garden?

Here’s where things get interesting. While we can’t give you a detailed breakdown of all the ways mycomicrothelia lichen might benefit your garden ecosystem, lichens in general are pretty amazing garden allies. They:

  • Help indicate good air quality (lichens are sensitive to pollution)
  • Provide habitat for tiny creatures
  • Add natural texture and visual interest to surfaces
  • Require absolutely zero maintenance from you

The Challenge of Identification

Now, here’s where we need to be honest with you – identifying mycomicrothelia lichen in your garden might be trickier than spotting a four-leaf clover. The scientific information about this particular species is quite limited, which means even lichen experts might have a tough time definitively pointing it out.

If you think you’ve found this lichen (or any interesting lichen, for that matter), your best bet is to:

  • Take clear, close-up photos
  • Note what surface it’s growing on
  • Record the location and environmental conditions
  • Reach out to local naturalist groups or botanical societies

The Bottom Line

Mycomicrothelia lichen represents one of those wonderful mysteries that make gardening and nature observation so exciting. While we can’t tell you exactly how to spot it or all the ways it might be helping your garden, we can say this: if you find lichens growing naturally in your space, consider yourself lucky! They’re signs of a healthy environment and add to the incredible diversity that makes native ecosystems so special.

So next time you’re wandering around your garden, take a moment to look closely at the surfaces around you. You might just discover something as intriguing as mycomicrothelia lichen – or at the very least, you’ll start to appreciate the amazing world of these fungi-algae partnerships that are quietly doing their thing all around us.

Mycomicrothelia Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Dothideales

Family

Arthopyreniaceae Walt. Watson

Genus

Mycomicrothelia Keissler - mycomicrothelia lichen

Species

Mycomicrothelia subfallens (Müll. Arg.) D. Hawksw. - mycomicrothelia lichen

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