North America Native Plant

Chaenothecopsis Lichen

Botanical name: Chaenothecopsis savonica

USDA symbol: CHSA6

Habit: lichen

Native status: Native to North America  

Synonyms: Chaenotheca savonica (Rasanen) Tibell (CHSA7)  ⚘  Mycocalicium savonicum Rasanen (MYSA6)   

Chaenothecopsis Lichen: A Tiny Forest Dweller Worth Knowing If you’ve ever wandered through a damp, shaded forest and noticed tiny pin-like structures poking up from rotting logs, you might have spotted the fascinating Chaenothecopsis savonica, commonly known as chaenothecopsis lichen. This diminutive organism is far more interesting than its modest ...

Chaenothecopsis Lichen: A Tiny Forest Dweller Worth Knowing

If you’ve ever wandered through a damp, shaded forest and noticed tiny pin-like structures poking up from rotting logs, you might have spotted the fascinating Chaenothecopsis savonica, commonly known as chaenothecopsis lichen. This diminutive organism is far more interesting than its modest appearance suggests!

What Exactly Is Chaenothecopsis Lichen?

Despite its name suggesting it’s a plant, chaenothecopsis lichen is actually a unique organism that’s part fungus, part algae. Like all lichens, it’s a remarkable partnership between these two very different life forms, working together in perfect harmony. The fungal partner provides structure and protection, while the algae partner produces food through photosynthesis – nature’s original roommate arrangement!

This particular species goes by a few scientific names you might encounter, including Chaenotheca savonica and Mycocalicium savonicum, but don’t worry about memorizing those tongue-twisters.

Where Does It Call Home?

Chaenothecopsis savonica is a proud North American native, making its home primarily in the boreal forests that stretch across the northern parts of our continent. You’ll most likely encounter this little character in cool, humid woodlands where fallen logs and decaying wood provide the perfect real estate.

Spotting This Forest Gem

Here’s what to look for on your next forest adventure:

  • Tiny, pin-like structures that look almost like miniature golf tees
  • Dark-colored stalks topped with small, round fruiting bodies
  • Growing directly on decaying wood, especially fallen logs and branches
  • Usually found in clusters, creating small communities on their wooden homes
  • Typically measures just a few millimeters tall – you’ll need to look closely!

Is It Beneficial for Your Garden?

While you can’t exactly plant chaenothecopsis lichen in your garden bed like you would a tomato, its presence is actually a wonderful sign! Finding lichens like this one indicates that your local ecosystem is healthy and unpolluted, since lichens are notoriously sensitive to air quality.

If you have a naturalized area of your property with fallen logs or want to create wildlife habitat, leaving dead wood in place can encourage lichens like this one to establish naturally. They’re part of the important decomposer community that helps break down organic matter and cycle nutrients back into the forest ecosystem.

The Bigger Picture

Though tiny and often overlooked, chaenothecopsis lichen plays its part in the grand web of forest life. It helps with the slow but crucial process of breaking down dead wood, contributing to the forest’s natural recycling system. Plus, some small invertebrates may use lichens as food or shelter, making them an important link in the food chain.

So next time you’re exploring a North American forest, take a moment to crouch down and examine those fallen logs more closely. You might just spot these remarkable little partnerships quietly doing their important work in the woodland community!

Chaenothecopsis Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Caliciales

Family

Mycocaliciaceae A.F.W. Schmidt

Genus

Chaenothecopsis Vain. - chaenothecopsis lichen

Species

Chaenothecopsis savonica (Rasanen) Tibell - chaenothecopsis lichen

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