North America Native Plant

Burnet’s Skin Lichen

Botanical name: Leptogium burnetiae

USDA symbol: LEBU5

Habit: lichen

Native status: Native to North America  

Discovering Burnet’s Skin Lichen: A Fascinating Garden Visitor You Can’t Plant Have you ever noticed thin, leafy patches growing on the bark of trees in your garden and wondered what they might be? You might be looking at Burnet’s skin lichen (Leptogium burnetiae), a fascinating organism that’s neither plant nor ...

Discovering Burnet’s Skin Lichen: A Fascinating Garden Visitor You Can’t Plant

Have you ever noticed thin, leafy patches growing on the bark of trees in your garden and wondered what they might be? You might be looking at Burnet’s skin lichen (Leptogium burnetiae), a fascinating organism that’s neither plant nor animal, but something wonderfully unique in between.

What Exactly Is Burnet’s Skin Lichen?

Despite its name containing lichen, Burnet’s skin lichen isn’t actually a plant at all. It’s a lichen – a remarkable partnership between a fungus and algae (or sometimes cyanobacteria) that work together in perfect harmony. The fungus provides structure and protection, while the algae partner produces food through photosynthesis. It’s like nature’s ultimate roommate situation, and it’s been working successfully for millions of years!

This particular lichen is native to North America, making it a legitimate part of our local ecosystems. Unlike invasive species that can cause problems in gardens, Burnet’s skin lichen is a gentle neighbor that minds its own business.

Where You’ll Find It

Burnet’s skin lichen has a preference for life in temperate regions across North America, though specific distribution information is limited for this particular species. You’re most likely to spot it growing on tree bark or occasionally on rocks, where it forms thin, leafy crusts that can range from blue-gray to brownish in color.

Identifying Burnet’s Skin Lichen

Here’s what to look for when trying to identify this intriguing organism:

  • Thin, leafy appearance that forms crust-like patches
  • Blue-gray to brownish coloration
  • Grows primarily on tree bark
  • Creates relatively flat, spreading formations
  • Texture appears somewhat papery or skin-like (hence the skin in its name)

Is It Beneficial to Your Garden?

While you can’t plant or cultivate Burnet’s skin lichen, its presence in your garden is actually a wonderful sign! Lichens are incredibly sensitive to air pollution, so finding them growing naturally indicates that your garden enjoys relatively clean air. Think of them as nature’s air quality monitors.

Although lichens don’t provide the same benefits as flowering plants (they don’t attract pollinators, for instance), they do play important ecological roles:

  • They contribute to biodiversity in your garden ecosystem
  • Some wildlife species use lichens for nesting material
  • They help break down organic matter and contribute to nutrient cycling
  • They’re completely harmless to trees and won’t damage bark or wood

Can You Grow Burnet’s Skin Lichen?

Here’s where things get interesting – you actually can’t plant, grow, or cultivate Burnet’s skin lichen in the traditional sense. Lichens are incredibly complex organisms that require very specific conditions to establish and thrive. They need clean air, just the right amount of moisture, and suitable surfaces to colonize.

The best thing you can do to encourage lichens in your garden is to maintain a healthy, chemical-free environment. Avoid using pesticides or other harsh chemicals that could harm these sensitive organisms.

Living Alongside Garden Lichens

If you’re lucky enough to have Burnet’s skin lichen growing in your garden, consider yourself fortunate! These slow-growing organisms are indicators of environmental health. Simply enjoy observing them and take pride in knowing that your garden provides a clean, welcoming environment for these fascinating creatures.

Remember, lichens are completely harmless to plants and structures. There’s no need to remove them – in fact, doing so would be removing a beneficial part of your garden’s ecosystem. Instead, take a moment to appreciate the incredible biological partnership happening right in your backyard.

The Bottom Line

While Burnet’s skin lichen isn’t something you can add to your shopping list or plant in your flower beds, discovering it in your garden is like finding a small treasure. It’s a sign of good environmental health and adds to the biodiversity that makes gardens such wonderful, complex ecosystems. So next time you spot those thin, leafy patches on your trees, give them a friendly nod – they’re doing important work, even if it’s not immediately obvious!

Burnet’s Skin Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Collemataceae Zenker

Genus

Leptogium (Ach.) A. Gray - skin lichen

Species

Leptogium burnetiae C.W. Dodge - Burnet's skin lichen

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