North America Native Plant

Staurothele Polygonia De

Botanical name: Staurothele polygonia de

USDA symbol: STPO9

Habit: lichen

Native status: Native to North America  

Discovering Staurothele polygonia: A North American Lichen Worth Knowing If you’ve ever wondered about those crusty, colorful patches you see growing on rocks, trees, or even old fences in your yard, you might have encountered a fascinating organism called a lichen. Today, we’re diving into the world of Staurothele polygonia, ...

Discovering Staurothele polygonia: A North American Lichen Worth Knowing

If you’ve ever wondered about those crusty, colorful patches you see growing on rocks, trees, or even old fences in your yard, you might have encountered a fascinating organism called a lichen. Today, we’re diving into the world of Staurothele polygonia, a lesser-known but intriguing lichen species native to North America.

What Exactly Is Staurothele polygonia?

Before we get too deep into the specifics, let’s clear up what we’re actually looking at. Staurothele polygonia isn’t a plant in the traditional sense – it’s a lichen! Lichens are remarkable partnerships between fungi and algae (or sometimes cyanobacteria) that work together to create what looks like a single organism. Think of it as nature’s ultimate roommate situation, where both parties benefit from the arrangement.

This particular lichen calls North America home, though specific details about its exact range and distribution remain somewhat mysterious in the scientific literature. What we do know is that it’s part of our continent’s rich tapestry of native organisms.

Is This Lichen Beneficial for Your Garden?

Here’s where things get interesting for gardeners and nature enthusiasts. While you can’t exactly plant Staurothele polygonia like you would a tomato or a rose bush, its presence in your outdoor space can actually be a good sign. Lichens are often indicators of clean air quality, acting like natural air monitors for your property.

Benefits of having lichens around include:

  • They contribute to biodiversity in your yard
  • Some provide tiny habitats for microscopic creatures
  • They can add subtle natural beauty and texture to rock gardens or natural areas
  • Their presence often indicates a healthy, unpolluted environment

How to Spot Staurothele polygonia

Identifying specific lichen species can be tricky business, even for experts. Staurothele polygonia belongs to a group of lichens that typically grow as crusty patches on various surfaces. Without getting too technical, here’s what to look for:

  • Look for crusty, flat growths on rocks, bark, or other hard surfaces
  • The color and texture may vary depending on environmental conditions
  • Like most lichens, it grows very slowly and may take years to become noticeable
  • It’s likely to be quite small and easily overlooked

Creating a Lichen-Friendly Environment

While you can’t plant lichens directly, you can certainly create conditions that welcome them to your space naturally. If you’re hoping to see more diverse lichens (including potentially Staurothele polygonia) in your garden, consider these approaches:

  • Minimize or eliminate the use of chemicals and pesticides
  • Leave some natural surfaces like rocks, old wood, or mature tree bark undisturbed
  • Maintain good air quality around your property
  • Be patient – lichens establish themselves very slowly over time

The Bottom Line

Staurothele polygonia may not be the showstopper that catches your eye like a brilliant wildflower, but it represents something equally valuable: the quiet, steady presence of native organisms that contribute to ecosystem health. If you spot what you think might be this lichen (or any lichen, for that matter) in your outdoor space, consider it a small victory for biodiversity.

Rather than trying to cultivate lichens directly, focus on creating a healthy, chemical-free environment where these fascinating partnerships can establish themselves naturally. Your patience will be rewarded with a richer, more complex ecosystem right in your own backyard.

Staurothele Polygonia De

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Verrucariales

Family

Verrucariaceae Eschw.

Genus

Staurothele Norman - wart lichen

Species

Staurothele polygonia de Lesd.

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