North America Native Plant

Lecania Lichen

Botanical name: Lecania fuscella

USDA symbol: LEFU2

Habit: lichen

Native status: Native to North America  

Synonyms: Lecania syringea (Ach.) Th. Fr. (LESY2)   

Lecania Lichen: The Tiny Garden Helper You Never Knew You Had Have you ever noticed small, crusty patches growing on tree bark or wooden structures in your yard? You might be looking at Lecania fuscella, commonly known as lecania lichen. While most gardeners focus on flowering plants and shrubs, these ...

Lecania Lichen: The Tiny Garden Helper You Never Knew You Had

Have you ever noticed small, crusty patches growing on tree bark or wooden structures in your yard? You might be looking at Lecania fuscella, commonly known as lecania lichen. While most gardeners focus on flowering plants and shrubs, these fascinating organisms are quietly playing important roles in our outdoor spaces.

What Exactly Is Lecania Lichen?

Lecania fuscella isn’t actually a plant at all – it’s a lichen! Lichens are remarkable partnerships between fungi and algae (or sometimes cyanobacteria) that work together as a single organism. Think of it as nature’s ultimate roommate situation, where both partners benefit from the arrangement.

This particular lichen species is native to North America and has been quietly colonizing surfaces across the continent for ages. You might also see it referred to by its scientific synonym, Lecania syringea, in older field guides or research papers.

Where You’ll Find Lecania Lichen

Lecania fuscella is distributed throughout North America, showing up in various habitats where it can find suitable surfaces to call home. It’s not picky about elevation or specific climate zones, making it one of those adaptable species that pops up in many different regions.

Spotting Lecania Lichen in Your Garden

Identifying lecania lichen is easier than you might think once you know what to look for:

  • Small, crusty patches that appear brownish to grayish in color
  • Typically found growing on tree bark, especially on the trunks of older trees
  • Also commonly seen on wooden fence posts, decks, and other wooden garden structures
  • Forms relatively flat, spreading patches rather than upright growth
  • Surface texture appears somewhat granular or crusty when viewed up close

Is Lecania Lichen Good for Your Garden?

The short answer is yes! While lecania lichen won’t add colorful blooms to your landscape, it does provide several subtle benefits:

First, lichens like Lecania fuscella are excellent indicators of air quality. Their presence suggests that your garden enjoys relatively clean air, since lichens are sensitive to pollution. Think of them as nature’s air quality monitors.

Additionally, lichens contribute to the overall ecosystem health of your garden by providing food and shelter for tiny creatures. Some insects and other small organisms use lichens as both food sources and hiding spots, adding to the biodiversity of your outdoor space.

Should You Encourage or Remove Lecania Lichen?

Here’s the thing about lichens – you can’t really plant them or encourage them to grow in specific spots. They’ll show up naturally when conditions are right, and they’re incredibly slow-growing. Trying to cultivate lichens is a bit like trying to herd cats – theoretically possible but practically frustrating.

As for removal, there’s generally no need to scrub lecania lichen off your trees or wooden structures. It’s not harmful to healthy trees and won’t cause damage to most wooden surfaces. In fact, removing it might do more harm than good, especially if you use harsh chemicals or aggressive scraping that could damage the underlying bark or wood.

Living Alongside Your Lichen Neighbors

The best approach with Lecania fuscella is simply to appreciate it as part of your garden’s natural community. These quiet little organisms are doing their thing without any help from you, contributing to the ecological complexity that makes healthy gardens so special.

Next time you’re wandering around your yard, take a closer look at those crusty patches on your trees and wooden structures. You might just develop a new appreciation for these remarkable partnerships between fungi and algae that have been perfecting their collaboration for millions of years.

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 fuscella (Schaerer) Körb. - 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