North America Native Plant

Neon’s Orange Lichen

Botanical name: Caloplaca neonii de

USDA symbol: CANE16

Habit: lichen

Native status: Native to North America  

Neon’s Orange Lichen: A Mysterious Crusty Character in Your Garden Have you ever noticed those colorful, crusty patches growing on rocks, tree bark, or even concrete surfaces around your property? You might be looking at a lichen! Today, we’re diving into the world of Neon’s orange lichen (Caloplaca neonii de), ...

Neon’s Orange Lichen: A Mysterious Crusty Character in Your Garden

Have you ever noticed those colorful, crusty patches growing on rocks, tree bark, or even concrete surfaces around your property? You might be looking at a lichen! Today, we’re diving into the world of Neon’s orange lichen (Caloplaca neonii de), a fascinating organism that’s more complex than it first appears.

What Exactly Is a Lichen?

Before we get into the specifics, let’s clear up what a lichen actually is – because it’s not quite what you might think! Lichens aren’t plants at all. They’re actually a incredible partnership between a fungus and an algae (or sometimes cyanobacteria), living together in perfect harmony. Think of it as nature’s ultimate roommate situation that’s been working out for millions of years.

The fungus provides structure and protection, while the algae does the photosynthesis, making food for both partners. Pretty neat, right?

Meet Neon’s Orange Lichen

Neon’s orange lichen is native to North America, though specific details about its exact range and distribution remain somewhat mysterious in the scientific literature. Like many members of the Caloplaca genus, this lichen likely displays those characteristic bright orange or yellow-orange colors that make it stand out against whatever surface it calls home.

Is This Lichen Good for Your Garden?

Here’s the thing about lichens – they’re generally fantastic additions to any ecosystem, including your garden! While you can’t exactly plant them like you would a flower or shrub, having lichens around is actually a great sign. Here’s why you should be happy to spot them:

  • They’re excellent air quality indicators – lichens are sensitive to pollution, so their presence suggests clean air
  • They add natural texture and color to surfaces that might otherwise look bland
  • They provide habitat and food for various small creatures and insects
  • They help prevent erosion on rocks and soil surfaces
  • They’re completely harmless to plants, structures, and people

How to Identify Neon’s Orange Lichen

Spotting this particular lichen can be tricky since detailed identification information is limited, but here are some general characteristics to look for:

  • Look for bright orange or yellow-orange coloration
  • It likely forms a crusty, flat growth pattern (called crustose in lichen-speak)
  • You’ll probably find it growing on rocks, concrete, or possibly tree bark
  • It may appear as small, scattered patches or larger continuous areas

Keep in mind that lichen identification can be quite challenging, even for experts, and often requires microscopic examination to be completely certain.

Creating a Lichen-Friendly Environment

While you can’t plant lichens like traditional garden plants, you can definitely encourage them to make themselves at home in your landscape:

  • Avoid using harsh chemicals or pressure washing surfaces where lichens grow
  • Leave some natural stone surfaces, old concrete, or weathered wood in your garden
  • Maintain good air quality around your property
  • Be patient – lichens grow very slowly, sometimes just millimeters per year

The Bottom Line

Neon’s orange lichen might not be the showstopper flower you’d typically feature in a garden blog, but it’s definitely worth appreciating! These hardy little partnerships between fungus and algae add subtle beauty to our landscapes while serving as living indicators of environmental health.

If you spot what you think might be this lichen in your garden, consider yourself lucky to have such a unique and ancient form of life sharing your space. Just remember to observe and appreciate rather than disturb – these slow-growing organisms have been perfecting their craft for far longer than we’ve been gardening!

Neon’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 neonii de Lesd. - Neon'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