North America Native Plant

Cup Lichen

Botanical name: Cladonia ecmocyna

USDA symbol: CLEC

Habit: lichen

Native status: Native to North America  

Cup Lichen: A Mysterious Native You Might Already Have in Your Garden Have you ever noticed tiny, cup-shaped structures growing on tree bark, old wood, or even soil in your garden? You might be looking at cup lichen, scientifically known as Cladonia ecmocyna. This fascinating organism isn’t actually a plant ...

Cup Lichen: A Mysterious Native You Might Already Have in Your Garden

Have you ever noticed tiny, cup-shaped structures growing on tree bark, old wood, or even soil in your garden? You might be looking at cup lichen, scientifically known as Cladonia ecmocyna. This fascinating organism isn’t actually a plant at all – it’s a lichen, which makes it a unique partnership between fungi and algae living together in perfect harmony.

What Exactly Is Cup Lichen?

Cup lichens belong to a remarkable group of organisms that blur the lines between the plant and fungal kingdoms. Unlike traditional plants, lichens don’t have roots, stems, or leaves. Instead, they’re composite organisms made up of a fungus that provides structure and an algae or cyanobacteria that produces food through photosynthesis. It’s nature’s ultimate roommate situation!

Cladonia ecmocyna is native to North America, though specific details about its exact range and distribution remain somewhat mysterious in botanical literature. This adds an air of intrigue to any garden fortunate enough to host these tiny treasures.

Is Cup Lichen Beneficial for Your Garden?

While you won’t be planting cup lichen like you would a tomato or rose bush, these lichens can actually be quite beneficial when they show up naturally in your garden space:

  • They indicate good air quality, as many lichens are sensitive to pollution
  • They add unique texture and visual interest to natural garden areas
  • They contribute to the overall biodiversity of your garden ecosystem
  • They can help with soil formation and nutrient cycling in natural areas

How to Identify Cup Lichen

Identifying cup lichen can be tricky since there are many species in the Cladonia genus, and Cladonia ecmocyna appears to be one of the less commonly documented species. However, cup lichens in general share some distinctive characteristics:

  • Small, cup or funnel-shaped structures (called podetia)
  • Usually found growing on wood, bark, or sometimes soil
  • Colors can range from grayish-green to brownish
  • Texture appears crusty or scaly at the base
  • Size typically ranges from a few millimeters to a couple centimeters

Should You Encourage Cup Lichen in Your Garden?

The wonderful thing about lichens like cup lichen is that they’re completely hands-off garden residents. You can’t really plant them or control them – they’ll appear when conditions are right and disappear when they’re not. If you spot them in your garden, consider yourself lucky! Their presence suggests you’re maintaining a healthy, natural environment.

If you want to create conditions that might attract lichens naturally, focus on:

  • Maintaining areas with older wood, such as logs or tree stumps
  • Keeping some undisturbed natural areas in your landscape
  • Avoiding excessive use of chemicals or fertilizers in natural zones
  • Allowing for good air circulation

The Bottom Line on Cup Lichen

Cup lichen represents one of nature’s most fascinating partnerships, and while Cladonia ecmocyna remains somewhat elusive in terms of detailed information, any lichen in your garden is a sign of a healthy ecosystem. Rather than trying to cultivate these organisms, appreciate them as spontaneous gifts from nature that add biodiversity and wonder to your outdoor space.

Remember, lichens grow incredibly slowly and can take years to establish, so if you’re fortunate enough to have them, treat them gently and enjoy observing these remarkable organisms that have been thriving on Earth for millions of years.

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 ecmocyna Leight. - 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