North America Native Plant

Deflexed Eggyolk Lichen

Botanical name: Candelariella deflexa

USDA symbol: CADE23

Habit: lichen

Native status: Native to North America  

Deflexed Eggyolk Lichen: A Tiny Golden Treasure in Your Garden Have you ever noticed small, yellowish-orange patches decorating the bark of trees in your yard? You might be looking at deflexed eggyolk lichen (Candelariella deflexa), a fascinating organism that’s more common than you’d think. Despite its quirky name, this tiny ...

Deflexed Eggyolk Lichen: A Tiny Golden Treasure in Your Garden

Have you ever noticed small, yellowish-orange patches decorating the bark of trees in your yard? You might be looking at deflexed eggyolk lichen (Candelariella deflexa), a fascinating organism that’s more common than you’d think. Despite its quirky name, this tiny lichen plays an important role in healthy ecosystems and can tell you quite a bit about the air quality in your neighborhood.

What Exactly Is Deflexed Eggyolk Lichen?

First things first – lichens aren’t plants! They’re actually a partnership between fungi and algae working together in perfect harmony. The deflexed eggyolk lichen gets its amusing name from its bright yellow to orange color, which can indeed remind you of a sunny-side-up egg yolk splattered on tree bark.

This native North American species forms thin, crusty patches that might look like someone dabbed paint on your trees. Don’t worry – it’s completely natural and actually quite beneficial to have around.

Where You’ll Find This Golden Gem

Deflexed eggyolk lichen has made itself at home across North America, thriving in various climates from temperate to boreal regions. You’ll typically spot it growing on the bark of deciduous trees, where it forms small colonies that can persist for many years.

Is It Good for Your Garden?

Absolutely! While you can’t exactly plant lichens like you would a rose bush, having deflexed eggyolk lichen show up naturally in your garden is actually a wonderful sign. Here’s why:

  • Air quality indicator: Lichens are sensitive to air pollution, so their presence suggests you have relatively clean air
  • Adds natural character: These golden patches create subtle texture and visual interest on tree bark
  • Supports biodiversity: While small, lichens contribute to the overall ecosystem health of your garden
  • Zero maintenance: They take care of themselves completely

How to Identify Deflexed Eggyolk Lichen

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

  • Color: Bright yellow to orange, sometimes with a slightly greenish tint
  • Texture: Crusty and somewhat powdery-looking
  • Size: Forms small patches, typically just a few inches across
  • Location: Almost always found on tree bark, particularly deciduous trees
  • Shape: Irregular patches that follow the contours of the bark

Creating Conditions for Natural Colonization

While you can’t plant deflexed eggyolk lichen directly, you can create conditions that encourage its natural establishment:

  • Maintain mature trees: Older trees with established bark provide ideal surfaces
  • Avoid chemical treatments: Skip fungicides and other chemicals that might harm lichens
  • Promote clean air: Support practices that maintain good air quality in your area
  • Be patient: Lichens establish slowly and naturally over time

A Few Words of Caution

There’s really nothing to worry about with deflexed eggyolk lichen! It won’t harm your trees or compete with other plants. Some people mistakenly think lichens damage trees, but they’re simply hitchhikers using the bark as a foundation. They don’t penetrate or harm the tree in any way.

The Bottom Line

Deflexed eggyolk lichen might be small, but it’s a delightful addition to any natural garden setting. Consider yourself lucky if these golden patches start appearing on your trees – they’re a sign of a healthy, balanced ecosystem. Rather than trying to remove them, embrace these tiny natural decorations as part of your garden’s unique character. After all, not everyone can say they have eggyolk lichen gracing their landscape!

Deflexed Eggyolk Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Candelariaceae Hakul.

Genus

Candelariella Müll. Arg. - eggyolk lichen

Species

Candelariella deflexa (Nyl.) Zahlbr. - deflexed eggyolk lichen

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