North America Native Plant

Phaeographis

Botanical name: Phaeographis

USDA symbol: PHAEO5

Habit: lichen

Native status: Native to North America  

Phaeographis: The Mysterious Script Lichen in Your Garden If you’ve ever wandered through a mature woodland or gazed closely at the bark of old trees in your garden, you might have spotted something that looks like nature’s own handwriting. Meet Phaeographis, a fascinating lichen that creates delicate, script-like patterns across ...

Phaeographis: The Mysterious Script Lichen in Your Garden

If you’ve ever wandered through a mature woodland or gazed closely at the bark of old trees in your garden, you might have spotted something that looks like nature’s own handwriting. Meet Phaeographis, a fascinating lichen that creates delicate, script-like patterns across tree bark and rock surfaces throughout North America.

What Exactly is Phaeographis?

Phaeographis isn’t your typical garden plant – it’s actually a lichen! Lichens are remarkable partnerships between fungi and algae, working together to create something entirely unique. This particular lichen earned its name from the Greek words meaning dark writing, and once you see it, you’ll understand why. It forms thin, dark lines that zigzag across surfaces like mysterious ancient script.

As a native North American species, Phaeographis has been quietly decorating our forests and urban trees for countless generations. You’ll find it naturally occurring across various regions of the continent, from temperate forests to more urban environments with suitable conditions.

How to Spot Phaeographis in Your Garden

Identifying this lichen is like becoming a nature detective. Here’s what to look for:

  • Thin, dark lines or squiggles on tree bark
  • Script-like or hieroglyphic patterns
  • Usually black or very dark brown coloration
  • Lines that appear to be written on smooth or slightly rough bark
  • Most commonly found on deciduous trees like maples, oaks, and birches

Is Phaeographis Good for Your Garden?

Absolutely! Finding Phaeographis in your garden is actually a wonderful sign. This lichen is quite sensitive to air pollution, so its presence indicates that your garden enjoys relatively clean air quality. Think of it as nature’s air quality monitor – and it works for free!

While Phaeographis doesn’t directly benefit pollinators like flowering plants do, it plays important ecological roles:

  • Provides microhabitats for tiny insects and other small creatures
  • Contributes to the overall biodiversity of your garden ecosystem
  • Adds unique visual interest and natural artistry to tree bark
  • Serves as an indicator of environmental health

Can You Grow or Encourage Phaeographis?

Here’s where things get interesting – you can’t actually plant or cultivate Phaeographis like you would a typical garden plant. This lichen will appear naturally in your garden when conditions are right. However, you can create an environment that welcomes it:

  • Maintain mature trees with relatively smooth bark
  • Avoid using harsh chemicals or pesticides that could harm air quality
  • Keep your garden naturally diverse and chemical-free
  • Be patient – lichens grow very slowly and establish over time

Living Alongside Your Script Lichen

If you’re lucky enough to have Phaeographis in your garden, simply appreciate it! There’s no special care required – in fact, the best thing you can do is leave it completely alone. Trying to scrub or remove it from tree bark will only harm both the lichen and potentially damage your trees.

Remember that lichens like Phaeographis are incredibly slow-growing. What you see today might have taken years or even decades to develop. It’s a living reminder of the patience and persistence of nature, creating art one microscopic growth at a time.

So next time you’re strolling through your garden, take a moment to look closely at your tree bark. You might just discover you’re hosting one of nature’s most elegant artists – quietly creating masterpieces that have been millions of years in the making.

Phaeographis

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Graphidales

Family

Graphidaceae Dumort.

Genus

Phaeographis Müll. Arg. - phaeographis

Species

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