North America Native Plant

Pseudocyphellaria Lichen

Botanical name: Pseudocyphellaria anthraspis

USDA symbol: PSAN61

Habit: lichen

Native status: Native to North America  

Synonyms: Sticta anthraspis Ach. (STAN8)   

Pseudocyphellaria Lichen: A Natural Air Quality Indicator in Your Landscape Have you ever noticed those leafy, gray-green patches growing on tree trunks in your yard and wondered what they were? Meet Pseudocyphellaria anthraspis, commonly known as Pseudocyphellaria lichen – a fascinating organism that’s actually doing your garden (and you!) a ...

Pseudocyphellaria Lichen: A Natural Air Quality Indicator in Your Landscape

Have you ever noticed those leafy, gray-green patches growing on tree trunks in your yard and wondered what they were? Meet Pseudocyphellaria anthraspis, commonly known as Pseudocyphellaria lichen – a fascinating organism that’s actually doing your garden (and you!) a huge favor.

What Exactly Is Pseudocyphellaria Lichen?

First things first – this isn’t actually a plant at all! Pseudocyphellaria anthraspis is a lichen, which is a unique partnership between a fungus and an algae living together in perfect harmony. Think of it as nature’s original roommate situation, where both partners benefit from the arrangement.

This particular lichen species is native to North America and was previously known by the scientific name Sticta anthraspis. It belongs to a group of lichens that have earned the nickname lung lichens due to their resemblance to lung tissue – though we promise they’re much prettier than that sounds!

Where You’ll Find This Helpful Hitchhiker

Pseudocyphellaria lichen is primarily found throughout the Pacific Northwest regions of North America, where it thrives in the cool, moist conditions of coastal forests. You’ll typically spot it growing on the bark of trees, particularly older deciduous trees and conifers, though it can also make itself at home on rocks and other surfaces.

Identifying Pseudocyphellaria Lichen

Spotting this lichen is easier than you might think once you know what to look for:

  • Foliose (leaf-like) structure with a gray-green to bluish-gray color
  • Distinctive white pores called pseudocyphellae on the underside – these are like tiny breathing holes
  • Lobed edges that create an irregular, somewhat wrinkled appearance
  • Usually grows in patches ranging from a few inches to over a foot across
  • Feels slightly leathery or papery to the touch

Is It Beneficial to Have in Your Garden?

Absolutely! While you can’t plant or cultivate Pseudocyphellaria lichen (it shows up on its own when conditions are right), having it in your landscape is actually a wonderful sign. Here’s why you should celebrate if you spot it:

Your Personal Air Quality Monitor

Lichens are incredibly sensitive to air pollution, particularly sulfur dioxide and other atmospheric pollutants. The presence of Pseudocyphellaria anthraspis in your yard is essentially nature’s way of giving you a gold star for clean air quality. If this lichen is thriving on your trees, it means your local environment has relatively low pollution levels – something that benefits both your garden and your health.

Ecosystem Support

While Pseudocyphellaria lichen doesn’t attract pollinators like flowering plants do, it plays other important ecological roles:

  • Provides microhabitats for tiny insects and other small creatures
  • Helps with nutrient cycling as it slowly breaks down organic matter
  • Contributes to the overall biodiversity of your landscape
  • Creates visual interest and natural texture on tree bark

Caring for Your Lichen Friends

The beauty of lichens is that they require zero care from you – in fact, they prefer to be left alone! Here’s what you should (and shouldn’t) do:

Do:

  • Leave them undisturbed on tree bark and surfaces
  • Maintain good air quality around your property
  • Avoid using harsh chemicals or pesticides nearby
  • Appreciate them as indicators of a healthy environment

Don’t:

  • Try to remove or scrape them off trees (they’re not harmful to the tree)
  • Attempt to transplant or move them
  • Worry about them infecting other plants – they’re not parasites

The Bottom Line

Pseudocyphellaria anthraspis might not be the showiest addition to your landscape, but it’s definitely one of the most beneficial. Consider it nature’s stamp of approval on your garden’s environmental health. If you’re lucky enough to have this lichen growing naturally in your yard, take a moment to appreciate these remarkable organisms that are quietly working to indicate the quality of the air you breathe every day.

So next time you’re strolling through your garden and spot those gray-green, leafy patches on your trees, give them a little nod of appreciation. They’re doing more good than you might realize, and they’re proof that your landscape is supporting a healthy, diverse ecosystem – even in the tiniest of ways.

Pseudocyphellaria Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Peltigerales

Family

Lobariaceae Chevall.

Genus

Pseudocyphellaria Vain. - Pseudocyphellaria lichen

Species

Pseudocyphellaria anthraspis (Ach.) H. Magn. - Pseudocyphellaria lichen

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