North America Native Plant

Dendriscocaulon Umhausense

Botanical name: Dendriscocaulon umhausense

USDA symbol: DEUM3

Habit: lichen

Native status: Native to North America  

Synonyms: Polychidium umhausense (Auersw.) Henssen (POUM3)   

Dendriscocaulon umhausense: The Mysterious Lichen in Your Backyard Have you ever noticed grayish-green crusty patches growing on tree bark in your yard and wondered what they were? You might be looking at Dendriscocaulon umhausense, a fascinating lichen that’s more common than you might think. While it doesn’t have a catchy ...

Dendriscocaulon umhausense: The Mysterious Lichen in Your Backyard

Have you ever noticed grayish-green crusty patches growing on tree bark in your yard and wondered what they were? You might be looking at Dendriscocaulon umhausense, a fascinating lichen that’s more common than you might think. While it doesn’t have a catchy common name, this little organism plays a surprisingly important role in healthy ecosystems.

What Exactly Is Dendriscocaulon umhausense?

First things first – Dendriscocaulon umhausense isn’t actually a plant at all! It’s a lichen, which is a remarkable partnership between a fungus and algae living together in perfect harmony. Think of it as nature’s ultimate roommate situation, where both organisms benefit from the arrangement.

This lichen was previously known by the scientific name Polychidium umhausense, so don’t be confused if you see that name in older field guides. Scientists love to rename things, apparently!

Where You’ll Find This Native Wonder

Dendriscocaulon umhausense is native to North America, making it a legitimate part of our local ecosystems. You’ll typically spot it growing on the bark of trees, particularly in areas with relatively clean air and adequate moisture.

Is It Good for Your Garden?

Here’s where things get interesting – while you can’t plant or cultivate Dendriscocaulon umhausense like a traditional garden plant, its presence is actually a fantastic sign! Lichens are incredibly sensitive to air pollution, so if you’re seeing this species in your yard, congratulations – you’ve got relatively clean air.

This lichen serves several beneficial functions:

  • Acts as a natural air quality indicator
  • Provides habitat for tiny insects and other microorganisms
  • Helps with nutrient cycling in forest ecosystems
  • Adds natural texture and visual interest to tree bark

How to Identify Dendriscocaulon umhausense

Spotting this lichen takes a bit of detective work, but it’s totally doable! Look for these characteristics:

  • Crusty, grayish-green patches on tree bark
  • Relatively small size – usually just a few centimeters across
  • Rough, granular texture that looks almost like it’s been sprinkled on the bark
  • Tends to grow in areas with some moisture but not constantly wet conditions

Can You Grow It?

Sorry to break it to you, but you can’t pop down to the garden center and pick up a pot of Dendriscocaulon umhausense! Lichens are notoriously difficult to cultivate, and this species will only appear naturally when conditions are just right.

The best thing you can do to encourage lichens like this one is to:

  • Maintain good air quality around your property
  • Avoid using harsh chemicals or pesticides near trees
  • Keep mature trees healthy and unstressed
  • Allow natural moisture patterns to persist

The Bottom Line

While Dendriscocaulon umhausense might not be the showstopping flowering plant you can add to your garden bed, it’s a wonderful indicator that your outdoor space is supporting healthy, natural ecosystems. If you spot it growing on your trees, take a moment to appreciate this tiny but mighty organism that’s been quietly doing its job in North American forests for countless years.

Next time you’re wandering around your yard, take a closer look at those tree trunks – you might just discover you’ve been hosting this fascinating lichen all along!

Dendriscocaulon Umhausense

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Peltigerales

Family

Lobariaceae Chevall.

Genus

Dendriscocaulon Nyl. - dendriscocaulon lichen

Species

Dendriscocaulon umhausense (Auersw.) Degel.

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