North America Native Plant

Felt Lichen

Botanical name: Peltigera ponojensis

USDA symbol: PEPO9

Habit: lichen

Native status: Native to North America  

Felt Lichen: A Fascinating Natural Indicator You Might Spot in Your Yard Have you ever noticed grayish-green, leafy-looking patches growing on the ground in shaded areas of your property and wondered what they were? You might be looking at felt lichen, scientifically known as Peltigera ponojensis. While you can’t exactly ...

Felt Lichen: A Fascinating Natural Indicator You Might Spot in Your Yard

Have you ever noticed grayish-green, leafy-looking patches growing on the ground in shaded areas of your property and wondered what they were? You might be looking at felt lichen, scientifically known as Peltigera ponojensis. While you can’t exactly plant this fascinating organism in your garden, understanding what it is and what it means for your landscape can be quite enlightening.

What Exactly Is Felt Lichen?

Felt lichen isn’t actually a plant at all – it’s a remarkable partnership between a fungus and an algae living together in perfect harmony. This collaboration creates what looks like a small, flat, leafy structure called a thallus. Think of it as nature’s original roommate situation, where both partners benefit from the arrangement.

Peltigera ponojensis is native to North America, particularly thriving in the boreal and subarctic regions of northern Canada and Alaska. This hardy little organism has adapted to some of the most challenging climates on the continent.

How to Identify Felt Lichen

Spotting felt lichen is easier than you might think once you know what to look for:

  • Gray-green to brownish coloration that may appear silvery when dry
  • Flat, leafy lobes that spread across the ground
  • Soft, felt-like texture (hence the name!)
  • Typically found growing directly on soil, moss, or decaying organic matter
  • Most commonly seen in shaded, moist areas

Is Felt Lichen Beneficial to Your Garden?

While you might not have invited felt lichen to your garden party, its presence is actually something to celebrate. Here’s why:

Felt lichen is like having a natural air quality monitor right in your yard. These sensitive organisms can only survive in areas with clean air, so finding them is actually a good sign that your local environment is healthy. They’re extremely sensitive to air pollution, making them excellent bioindicators of environmental health.

Additionally, lichens play important roles in their ecosystems by helping to break down organic matter and contributing to soil formation over time. They’re also part of the food web, providing sustenance for various small creatures.

Why You Can’t (and Shouldn’t Try to) Grow Felt Lichen

Unlike your typical garden plants, felt lichen can’t be cultivated in the traditional sense. Here’s why attempting to grow it would be futile:

  • Requires an extremely specific symbiotic relationship between fungus and algae
  • Needs pristine air quality to survive
  • Grows incredibly slowly, often taking years to establish
  • Cannot tolerate disturbance or transplantation
  • Thrives only in very specific climatic conditions

What to Do If You Find Felt Lichen

If you’re lucky enough to discover felt lichen in your landscape, the best thing you can do is simply appreciate it and leave it alone. Avoid walking on it, disturbing the area, or trying to relocate it. Consider it a compliment to your property’s environmental health!

Keep the area around it as natural as possible – avoid using chemicals, fertilizers, or other garden treatments nearby, as these can harm or kill the lichen. Think of felt lichen as nature’s way of giving your yard a gold star for clean living.

While felt lichen might not be the showstopper you can add to your garden wish list, discovering it in your landscape is like finding a hidden treasure that speaks to the health and natural balance of your outdoor space.

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 ponojensis Gyel. - 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