North America Native Plant

Jelly Lichen

Botanical name: Collema coccophorum

USDA symbol: COCO25

Habit: lichen

Native status: Native to North America  

Synonyms: Collema dubium de Lesd. (CODU2)  ⚘  Collema novomexicanum de Lesd. (CONO3)   

Jelly Lichen: The Fascinating Collema coccophorum in Your Garden Have you ever noticed those peculiar, dark, jelly-like growths on rocks, soil, or tree bark after a good rain? You might be looking at jelly lichen, scientifically known as Collema coccophorum. This fascinating organism isn’t actually a plant at all – ...

Jelly Lichen: The Fascinating Collema coccophorum in Your Garden

Have you ever noticed those peculiar, dark, jelly-like growths on rocks, soil, or tree bark after a good rain? You might be looking at jelly lichen, scientifically known as Collema coccophorum. This fascinating organism isn’t actually a plant at all – it’s a lichen, which makes it one of nature’s most remarkable partnerships!

What Exactly Is Jelly Lichen?

Jelly lichen is a composite organism made up of a fungus living in a mutually beneficial relationship with algae or cyanobacteria. This partnership allows the lichen to survive in conditions where neither partner could thrive alone. The fungus provides structure and protection, while the algae or bacteria produce food through photosynthesis.

When dry, Collema coccophorum appears as a dark, crusty, almost blackish-brown mass that might look dead or lifeless. But here’s where it gets exciting – add some moisture, and this seemingly lifeless organism transforms into a gelatinous, almost translucent structure that’s quite remarkable to observe!

Where You’ll Find This Native Wonder

Jelly lichen is native to North America and can be found naturally occurring across various regions of the continent. You’re most likely to spot it in areas with adequate moisture and suitable substrates like rocks, soil, or tree bark.

Is Jelly Lichen Beneficial in Your Garden?

While you won’t be planting jelly lichen in your garden beds, its presence can actually be a positive sign! Here’s why:

  • Air quality indicator: Lichens are sensitive to air pollution, so their presence often indicates good air quality
  • Soil health: Some lichens can help improve soil structure and add nutrients as they break down
  • Ecosystem diversity: They contribute to the overall biodiversity of your garden ecosystem
  • Natural beauty: They add interesting textures and forms to natural landscapes

How to Identify Jelly Lichen

Spotting Collema coccophorum is all about knowing what to look for and when:

  • Dry conditions: Look for dark, crusty, flattened growths on rocks, soil, or bark
  • Wet conditions: After rain or watering, watch for the transformation into a gelatinous, somewhat translucent mass
  • Color: Ranges from dark greenish-black to brownish
  • Texture: Jelly-like when moist, brittle and crusty when dry
  • Location: Often found on calcareous rocks, soil, or tree bark

Living Alongside Jelly Lichen

The wonderful thing about jelly lichen is that it requires absolutely no care from you! In fact, trying to help it could actually harm this delicate organism. Here’s how to be a good neighbor to any jelly lichen in your garden:

  • Avoid disturbance: Don’t try to move or transplant lichens – they have specific requirements that are difficult to replicate
  • Limit chemicals: Avoid using pesticides or herbicides near areas where lichens grow
  • Preserve habitat: If you’re doing landscaping, consider leaving some natural rocky or bark surfaces where lichens can thrive
  • Enjoy observation: Use a magnifying glass to get a closer look at this fascinating organism

The Bottom Line

While you can’t cultivate jelly lichen like you would a flowering plant, finding Collema coccophorum in your garden is actually a wonderful discovery! It’s a sign of a healthy, diverse ecosystem and good air quality. Rather than trying to grow it, simply appreciate this remarkable organism for what it is – a living testament to the incredible partnerships that exist in nature.

Next time you’re in your garden after a rain shower, take a moment to look for these amazing transforming organisms. You might just discover a whole new appreciation for the smaller, often overlooked inhabitants of your outdoor space!

Jelly Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Collemataceae Zenker

Genus

Collema F.H. Wigg - jelly lichen

Species

Collema coccophorum Tuck. - jelly lichen

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