Native Plants

Anisomeridium Anisolobum

Anisomeridium anisolobum

USDA symbol: ANAN14

North America: native

If you’ve ever taken a close look at the bark of trees in your garden or local woods, you might have noticed thin, crusty patches that look almost painted on. Meet Anisomeridium anisolobum, a fascinating lichen that’s been quietly doing important work in North American ecosystems long before we started ...

Anisomeridium anisolobum: The Quiet Garden Helper You Never Knew You Had

If you’ve ever taken a close look at the bark of trees in your garden or local woods, you might have noticed thin, crusty patches that look almost painted on. Meet Anisomeridium anisolobum, a fascinating lichen that’s been quietly doing important work in North American ecosystems long before we started paying attention to native species.

What Exactly Is Anisomeridium anisolobum?

Let’s clear up any confusion right away – this isn’t a plant you can pick up at your local nursery. Anisomeridium anisolobum is actually a lichen, which means it’s a unique partnership between a fungus and algae living together in perfect harmony. Think of it as nature’s ultimate roommate situation that actually works out!

This particular lichen forms thin, whitish to grayish crusts that hug tree bark so closely they almost seem to be part of the tree itself. You might also encounter it under its scientific synonyms Anisomeridium feeanum or Ditremis anisoloba in older field guides.

Where You’ll Find This Native Species

As a native to North America, Anisomeridium anisolobum has made itself at home primarily in the eastern and southeastern United States. It’s particularly fond of the bark of deciduous trees in areas with good humidity levels.

Is It Beneficial to Your Garden?

Absolutely! While you can’t plant or cultivate Anisomeridium anisolobum in the traditional sense, having it show up naturally in your garden is actually a wonderful sign. Here’s why you should be happy to see it:

  • It’s an excellent indicator of good air quality – lichens are sensitive to pollution
  • It contributes to the overall biodiversity of your garden ecosystem
  • It helps with nutrient cycling by slowly breaking down organic matter
  • It adds subtle texture and visual interest to tree bark

How to Identify Anisomeridium anisolobum

Spotting this lichen requires getting up close and personal with your trees. Here’s what to look for:

  • Thin, crusty patches on tree bark that appear whitish to grayish
  • A smooth, almost painted-on appearance that follows the contours of the bark
  • Typically found on deciduous trees rather than conifers
  • Forms continuous patches rather than distinct, separate spots

The best time to observe lichens is after rain or during humid conditions when their colors tend to be more pronounced.

Creating Lichen-Friendly Conditions

While you can’t plant this species directly, you can create an environment where it might naturally establish:

  • Maintain healthy deciduous trees in your landscape
  • Avoid using harsh chemicals or treatments on tree bark
  • Ensure good air circulation around trees
  • Keep pollution levels low in your garden area

The Bottom Line

Anisomeridium anisolobum might not be the showstopper perennial you’re planning for your garden borders, but it’s a valuable native species that deserves recognition. If you’re lucky enough to spot it growing naturally on your trees, consider it a badge of honor – your garden ecosystem is healthy enough to support these sensitive organisms. Rather than trying to remove it, embrace it as part of your garden’s natural heritage and a sign that you’re doing something right in creating a welcoming environment for native species.

Anisomeridium anisolobum is also known as...

Often we refer to plants by their common names. When shopping for plants the scientific name is the best way to positively identify the plant species you desire. But some plants have more than one name! While it doesn't happen often, nurseries might display one name while you're searching for another. Anisomeridium anisolobum is also known as:

Anisomeridium feeanum | USDA symbol: ANFE4
Ditremis anisoloba | USDA symbol: DIAN6

Why do some plants have more than one name? Over time plant species may be renamed for a few reasons:

  1. Botanists in different regions named the same plant without knowing it had already been classified.
  2. A species was reclassified after scientific advances in, for example, DNA analysis.
  3. Slight variations within a species are sometimes mistakenly identified as entirely new species.

Classification

Group: Lichen
Kingdom: Fungi - Fungi
Division: Ascomycota - Sac fungi
Class: Ascomycetes
Order: Dothideales
Family: Monoblastiaceae Walt. Watson
Genus: Anisomeridium (Müll. Arg.) M. Choisy - anisomeridium lichen

Species: Anisomeridium anisolobum (Müll. Arg.) Aptroot

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