North America Native Plant

Florida Orange Lichen

Botanical name: Caloplaca floridana

USDA symbol: CAFL32

Habit: lichen

Native status: Native to North America  

Synonyms: Lecanora floridana Tuck. (LEFL14)   

Florida Orange Lichen: A Tiny Splash of Sunshine in Your Garden Have you ever noticed small, bright orange patches decorating the concrete walls, limestone rocks, or old brick surfaces around your property? Meet the Florida orange lichen (Caloplaca floridana), a fascinating little organism that’s been quietly adding natural color to ...

Florida Orange Lichen: A Tiny Splash of Sunshine in Your Garden

Have you ever noticed small, bright orange patches decorating the concrete walls, limestone rocks, or old brick surfaces around your property? Meet the Florida orange lichen (Caloplaca floridana), a fascinating little organism that’s been quietly adding natural color to southeastern landscapes for centuries.

What Exactly Is Florida Orange Lichen?

Before we dive deeper, let’s clear up what a lichen actually is – because it’s pretty amazing! Florida orange lichen isn’t a plant at all, but rather a partnership between a fungus and algae living together in perfect harmony. This dynamic duo creates those eye-catching orange to yellow-orange crusty patches you might spot on hard surfaces around your garden.

Scientifically known as Caloplaca floridana (formerly called Lecanora floridana), this native North American species has been quietly brightening up the Southeast for ages.

Where You’ll Find This Colorful Character

Florida orange lichen calls the southeastern United States home, with a particular fondness for Florida’s sunny climate. You’ll typically spot these vibrant patches growing on limestone, concrete walls, old brick structures, and other hard, alkaline surfaces.

Spotting Florida Orange Lichen in Your Landscape

Identifying Florida orange lichen is pretty straightforward once you know what to look for:

  • Bright orange to yellow-orange coloration
  • Crusty, patch-like appearance
  • Grows directly on hard surfaces like stone, concrete, or brick
  • Forms irregular, spreading colonies
  • Typically small – individual patches rarely exceed a few inches across

Is Florida Orange Lichen Beneficial for Your Garden?

While you can’t exactly plant Florida orange lichen like you would a flower, having it around comes with some subtle benefits:

  • Adds natural color and visual interest to otherwise plain surfaces
  • Indicates good air quality – lichens are sensitive to pollution
  • Contributes to local biodiversity
  • Helps with natural weathering and soil formation over time
  • Requires zero maintenance once established

Creating Conditions for Natural Establishment

You can’t exactly plant Florida orange lichen, but you can create conditions that might encourage its natural appearance:

  • Maintain clean air around your property
  • Include limestone, concrete, or brick features in your landscape
  • Avoid using harsh chemicals on stone surfaces
  • Be patient – lichens establish very slowly

Living Alongside Your Lichen Neighbors

If Florida orange lichen has already made itself at home on your property, consider yourself lucky! These little organisms are completely harmless and actually indicate that your local environment is healthy. They won’t damage your structures, and they add a unique natural element that many gardeners pay good money to replicate with artificial features.

The next time you’re strolling through your garden and spot those cheerful orange patches, take a moment to appreciate these remarkable partnerships between fungi and algae. Florida orange lichen might be small, but it’s a perfect example of how nature finds a way to add beauty to even the most unexpected places.

Florida Orange Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Teloschistales

Family

Teloschistaceae Zahlbr.

Genus

Caloplaca Th. Fr. - orange lichen

Species

Caloplaca floridana (Tuck.) S. Tucker - Florida orange lichen

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