North America Native Plant

Felt Lichen

Botanical name: Peltigera retifoveata

USDA symbol: PERE11

Habit: lichen

Native status: Native to North America  

Felt Lichen: The Fascinating Forest Floor Dweller You Should Know Have you ever taken a closer look at the forest floor during a nature walk and noticed what looks like leafy, grayish-green patches scattered about? You might have been looking at felt lichen (Peltigera retifoveata), one of North America’s most ...

Felt Lichen: The Fascinating Forest Floor Dweller You Should Know

Have you ever taken a closer look at the forest floor during a nature walk and noticed what looks like leafy, grayish-green patches scattered about? You might have been looking at felt lichen (Peltigera retifoveata), one of North America’s most interesting native species that’s doing way more for the environment than you might think!

What Exactly Is Felt Lichen?

Before we dive in, let’s clear up a common misconception: lichens aren’t plants at all! Felt lichen is actually a fascinating partnership between fungi and algae (or sometimes cyanobacteria) living together in perfect harmony. This amazing duo creates what looks like a single organism, but it’s really two different life forms working as a team.

Peltigera retifoveata gets its felt common name from its soft, somewhat fuzzy texture that resembles felt fabric. But what really makes this lichen stand out is its distinctive reticulated pattern – that’s a fancy way of saying it has a cool net-like design on its upper surface that looks almost like nature’s own artwork.

Where You’ll Find This Native Beauty

Felt lichen is native to North America, where it naturally occurs across cooler temperate regions, including parts of Canada and the northern United States. You’ll typically spot it in undisturbed forest environments where the air is clean and the humidity levels are just right.

Identifying Felt Lichen in the Wild

Ready to become a lichen detective? Here’s what to look for when trying to identify Peltigera retifoveata:

  • Color: Grayish-green to brownish upper surface
  • Pattern: Distinctive net-like (reticulated) markings on top
  • Underside: Whitish with brown veins running through it
  • Texture: Soft and felt-like to the touch
  • Size: Forms patches that can spread several inches across
  • Habitat: Found on soil, moss, or decaying organic matter in shaded forest areas

Why Felt Lichen Is a Garden Hero (Even If You Can’t Grow It)

While you can’t exactly pop felt lichen into your shopping cart at the garden center, this remarkable organism is incredibly beneficial to have around your property – if you’re lucky enough to have the right conditions!

Felt lichen serves as nature’s air quality monitor. These sensitive organisms are like tiny environmental detectives, thriving only in areas with clean air. If you spot felt lichen on your property, give yourself a pat on the back – it means your local air quality is pretty darn good!

Additionally, lichens like Peltigera retifoveata contribute to soil health by slowly breaking down organic matter and adding nutrients to the ecosystem. They’re also part of the complex web of forest floor life that supports countless other organisms.

Can You Cultivate Felt Lichen?

Here’s where we need to set realistic expectations: you can’t really grow felt lichen in the traditional sense. These organisms require very specific conditions – clean air, proper humidity levels, and the right substrate – that are difficult to replicate in most garden settings.

Instead of trying to cultivate felt lichen, the best approach is to create and maintain conditions that might naturally encourage its establishment:

  • Minimize air pollution around your property
  • Maintain areas of undisturbed forest floor if you have wooded sections
  • Avoid using pesticides and chemicals that could harm sensitive organisms
  • Preserve natural moisture levels in shaded areas
  • Leave some areas wild rather than heavily managed

The Bottom Line

While felt lichen won’t be starring in your flower beds anytime soon, discovering it on your property is like finding a hidden treasure. It’s a sign of environmental health and adds to the rich tapestry of native species that make our ecosystems thrive.

Next time you’re exploring a forest or even a quiet corner of your own property, take a moment to look down at the forest floor. You might just spot the intricate beauty of Peltigera retifoveata doing its quiet but important work in the world of nature’s partnerships!

Felt Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Peltigerales

Family

Peltigeraceae Dumort.

Genus

Peltigera Willd. - felt lichen

Species

Peltigera retifoveata Vitik. - felt lichen

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