North America Native Plant

Bratt’s Orange Lichen

Botanical name: Caloplaca brattiae

USDA symbol: CABR33

Habit: lichen

Native status: Native to North America  

Bratt’s Orange Lichen: A Tiny Natural Artist in Your Garden If you’ve ever noticed small patches of bright orange or yellow-orange coloring on rocks in your garden or landscape, you might have encountered Bratt’s orange lichen (Caloplaca brattiae). This fascinating little organism isn’t actually a plant at all – it’s ...

Bratt’s Orange Lichen: A Tiny Natural Artist in Your Garden

If you’ve ever noticed small patches of bright orange or yellow-orange coloring on rocks in your garden or landscape, you might have encountered Bratt’s orange lichen (Caloplaca brattiae). This fascinating little organism isn’t actually a plant at all – it’s a lichen, which makes it quite special in the world of garden inhabitants.

What Exactly Is Bratt’s Orange Lichen?

Lichens are remarkable partnerships between fungi and algae that work together to create something neither could achieve alone. Bratt’s orange lichen forms crusty, colorful patches that seem to paint natural artwork across rock surfaces. Unlike plants, lichens don’t have roots, stems, or leaves, and they create their own food through photosynthesis while getting minerals directly from their rocky homes.

Where You’ll Find This Native Beauty

Caloplaca brattiae is native to North America, particularly thriving in the western regions of the continent. You’re most likely to spot this lichen in arid and semi-arid areas where it has claimed residence on exposed rock surfaces, from garden boulders to natural stone features.

Identifying Bratt’s Orange Lichen

Spotting this lichen is like finding nature’s graffiti, but in the best possible way:

  • Look for bright orange to yellow-orange crusty patches on rocks
  • The surface appears somewhat rough or granular rather than smooth
  • Patches are typically small, often just a few inches across
  • Colors may be more vibrant when the lichen is moist
  • Found exclusively on rock surfaces, not on soil or wood

Is It Beneficial to Have in Your Garden?

While Bratt’s orange lichen won’t attract butterflies or provide nectar like flowering plants, it offers its own unique benefits:

  • Adds natural color and visual interest to rock features
  • Indicates good air quality – lichens are sensitive to pollution
  • Contributes to biodiversity in your landscape ecosystem
  • Requires absolutely no maintenance or care
  • Helps with slow rock weathering, contributing to soil formation over time

Creating Conditions for Natural Occurrence

You can’t plant or grow Bratt’s orange lichen in the traditional sense, but you can create conditions where it might naturally establish itself:

  • Include natural stone features like boulders or rock walls
  • Choose locations with good air circulation
  • Avoid areas with heavy foot traffic or disturbance
  • Maintain clean air around your property (avoid excessive chemical spraying)
  • Be patient – lichens grow very slowly

Living Alongside This Natural Wonder

If you discover Bratt’s orange lichen on rocks in your landscape, consider yourself lucky to host this fascinating organism. These lichens are incredibly slow-growing and can live for decades or even centuries. They’re harmless to rocks and actually indicate a healthy environment.

The best approach is simply to appreciate them for what they are – living art created by nature’s partnership between fungi and algae. Avoid scrubbing or removing them from rocks, as they take many years to establish and grow.

Next time you’re wandering through your garden, take a moment to look closely at any stone features you have. You might just discover these tiny orange treasures adding their own splash of color to your natural landscape.

Bratt’s 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 brattiae W.A. Weber - Bratt's 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