North America Native Plant

Lecania Lichen

Botanical name: Lecania brunonis

USDA symbol: LEBR3

Habit: lichen

Native status: Native to North America  

Lecania Lichen: A Tiny But Fascinating Garden Visitor Have you ever noticed small, crusty patches on rocks, tree bark, or even concrete surfaces in your garden and wondered what they were? You might be looking at a lichen! Today, we’re diving into the world of Lecania brunonis, commonly known as ...

Lecania Lichen: A Tiny But Fascinating Garden Visitor

Have you ever noticed small, crusty patches on rocks, tree bark, or even concrete surfaces in your garden and wondered what they were? You might be looking at a lichen! Today, we’re diving into the world of Lecania brunonis, commonly known as lecania lichen – a fascinating organism that’s probably already living in your outdoor space without you even realizing it.

What Exactly is Lecania Lichen?

Let’s clear up a common misconception right away: Lecania brunonis isn’t actually a plant at all! It’s a lichen, which is a remarkable partnership between a fungus and algae (or sometimes cyanobacteria) living together in perfect harmony. This partnership, called symbiosis, allows lichens to survive in places where neither partner could live alone.

Lecania lichen belongs to the crustose lichen family, meaning it forms thin, crust-like patches that are tightly attached to whatever surface they’re growing on. Think of it as nature’s living paint – once it’s there, it’s there to stay!

Where You’ll Find This Native Beauty

Lecania brunonis is native to North America, making it a legitimate part of our natural heritage. While specific distribution details for this particular species are limited in scientific literature, lichens in the Lecania genus are typically found across various regions of the continent.

Is Lecania Lichen Good for Your Garden?

Absolutely! While you won’t be planting lecania lichen like you would a flower or shrub, having it appear naturally in your garden is actually a wonderful sign. Here’s why:

  • Air quality indicator: Lichens are incredibly sensitive to air pollution, so their presence suggests you have relatively clean air in your garden
  • Minimal impact: They don’t harm the surfaces they grow on – they’re just hitchhiking, not parasitic
  • Adds character: These crusty patches add subtle texture and natural patina to rocks, fence posts, and tree bark
  • Low maintenance: They require absolutely no care from you – they’re the ultimate low-maintenance garden residents

How to Identify Lecania Lichen

Spotting Lecania brunonis in your garden requires a keen eye, as it’s quite small and unassuming. Here’s what to look for:

  • Appearance: Forms thin, crusty patches that look almost painted onto surfaces
  • Color: Typically grayish to brownish, though this can vary based on environmental conditions
  • Texture: Smooth to slightly rough, firmly attached to the substrate
  • Size: Individual patches are usually small, often just a few centimeters across
  • Location: Look on bark, rocks, concrete, or other hard surfaces

Creating a Lichen-Friendly Garden

While you can’t plant lichens like traditional garden plants, you can create conditions that welcome them naturally:

  • Avoid using harsh chemicals or pressure washing surfaces where lichens might grow
  • Leave some natural, undisturbed surfaces like rocks or old wooden structures
  • Maintain good air quality by avoiding excessive use of pesticides or herbicides
  • Be patient – lichens grow extremely slowly, sometimes taking years to establish

The Bottom Line

Lecania brunonis might not be the showstopper of your garden, but it’s a quiet testament to the health and natural balance of your outdoor space. These tiny crusty patches represent millions of years of evolutionary cooperation and adaptation. So the next time you spot what looks like natural graffiti on a rock or tree trunk, take a moment to appreciate these remarkable organisms that have been quietly decorating our landscapes long before we ever picked up our first gardening tool.

Remember, a garden that welcomes lichens is a garden that’s in harmony with nature – and that’s something worth celebrating!

Lecania Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Bacidiaceae Walt. Watson

Genus

Lecania A. Massal. - lecania lichen

Species

Lecania brunonis (Tuck.) Herre - lecania lichen

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