North America Native Plant

Cup Lichen

Botanical name: Cladonia subsquamosa

USDA symbol: CLSU62

Habit: lichen

Native status: Native to North America  

Cup Lichen: A Fascinating Natural Addition to Your Garden Landscape Have you ever noticed tiny, cup-shaped structures dotting the ground in your garden or local woodland? Meet the cup lichen (Cladonia subsquamosa), one of nature’s most intriguing collaborative organisms that might already be calling your outdoor space home! What Exactly ...

Cup Lichen: A Fascinating Natural Addition to Your Garden Landscape

Have you ever noticed tiny, cup-shaped structures dotting the ground in your garden or local woodland? Meet the cup lichen (Cladonia subsquamosa), one of nature’s most intriguing collaborative organisms that might already be calling your outdoor space home!

What Exactly Is Cup Lichen?

Cup lichen isn’t actually a plant at all – it’s something far more fascinating! This remarkable organism is a partnership between a fungus and algae, working together in perfect harmony. The result is those charming little gray-green cups that seem to sprout from the earth like miniature goblets. These cup-shaped structures, called podetia, are what give this lichen its common name and distinctive appearance.

Where You’ll Find Cup Lichen

As a native species to North America, cup lichen has made itself at home across a vast range of the continent. You might spot it from Canada all the way down through various regions of the United States, thriving in diverse climates and conditions.

Identifying Cup Lichen in Your Garden

Spotting cup lichen is like discovering tiny natural sculptures in your landscape. Here’s what to look for:

  • Small, cup or goblet-shaped structures rising from the ground
  • Grayish-green to pale green coloration
  • Rough, somewhat scaly texture on the cups
  • Height typically ranging from a few millimeters to about an inch tall
  • Often found growing in clusters or patches
  • Commonly appears on acidic soil, rotting wood, or sandy ground

Is Cup Lichen Beneficial for Your Garden?

While you can’t exactly plant cup lichen like you would a flower, its presence in your garden is actually a wonderful sign! Here’s why you should welcome these tiny collaborators:

  • Soil health indicators: Cup lichens often indicate healthy, unpolluted soil conditions
  • Erosion control: They help stabilize soil and prevent erosion in natural areas
  • Low-maintenance ground cover: They thrive in areas where traditional plants might struggle
  • Ecosystem support: While they don’t attract pollinators, they contribute to the overall biodiversity of your garden ecosystem
  • Unique aesthetic appeal: They add an otherworldly, almost fairy-tale quality to rock gardens and woodland settings

Creating the Right Environment

Rather than trying to grow cup lichen, you can encourage its natural establishment by maintaining the right conditions:

  • Acidic conditions: Cup lichens prefer acidic soils and substrates
  • Good drainage: While they need some moisture, waterlogged conditions aren’t ideal
  • Minimal disturbance: Avoid heavy foot traffic or frequent soil disruption in areas where they appear
  • Reduced fertilization: These organisms thrive in low-nutrient conditions
  • Clean air: Lichens are sensitive to air pollution, so their presence indicates good air quality

Perfect Garden Settings for Cup Lichen

Cup lichen naturally fits into several garden styles:

  • Rock gardens: Perfect for filling gaps between stones and adding textural interest
  • Woodland gardens: Complements the natural forest floor aesthetic
  • Native plant gardens: Supports the goal of using indigenous species
  • Low-maintenance landscapes: Ideal for areas you want to keep natural and undisturbed

A Living Partnership Worth Celebrating

Cup lichen represents one of nature’s most successful collaborations, and having it in your garden means you’re providing habitat for this remarkable partnership. While you might not be able to purchase it at your local nursery, you can certainly appreciate and protect any cup lichens that choose to make your garden their home. Think of them as tiny, living sculptures that require no care, no watering, and no fertilizing – just your appreciation and gentle stewardship of their preferred habitat!

Next time you’re strolling through your garden, take a moment to look down and see if you spot any of these fascinating cup-shaped collaborators. They might just change the way you think about what makes a garden truly complete.

Cup Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Cladoniaceae Zenker

Genus

Cladonia P. Browne - cup lichen

Species

Cladonia subsquamosa Krempelh. - cup lichen

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