North America Native Plant

Fecund Jelly Lichen

Botanical name: Collema fecundum

USDA symbol: COFE4

Habit: lichen

Native status: Native to North America  

Fecund Jelly Lichen: The Fascinating Gelatinous Wonder in Your Garden Have you ever stumbled across something that looks like a translucent, jelly-like blob clinging to tree bark or rocks in your garden? Meet the fecund jelly lichen (Collema fecundum), one of nature’s most intriguing partnerships that might already be calling ...

Fecund Jelly Lichen: The Fascinating Gelatinous Wonder in Your Garden

Have you ever stumbled across something that looks like a translucent, jelly-like blob clinging to tree bark or rocks in your garden? Meet the fecund jelly lichen (Collema fecundum), one of nature’s most intriguing partnerships that might already be calling your outdoor space home!

What Exactly Is Fecund Jelly Lichen?

Before we dive deeper, let’s clear up what we’re dealing with here. Collema fecundum isn’t a plant at all—it’s a lichen! Lichens are remarkable organisms that represent a successful partnership between fungi and algae (or sometimes cyanobacteria). Think of it as nature’s ultimate roommate situation, where both parties benefit from living together.

The fecund part of its name refers to its prolific reproductive nature, while jelly describes its distinctive gelatinous appearance when moisture is present. When dry, this lichen might look like crusty, dark patches, but add a little rain or morning dew, and it transforms into something that resembles edible seaweed!

Where You’ll Find This Native Wonder

As a native species to North America, fecund jelly lichen has been quietly going about its business in our ecosystems long before any of us started gardening. You’ll typically spot it growing on tree bark, particularly on hardwoods, and occasionally on rocks in areas with good air quality.

Is Fecund Jelly Lichen Beneficial for Your Garden?

While you can’t exactly plant fecund jelly lichen like you would a tomato, its presence in your garden is actually a wonderful sign! Here’s why you should be excited to discover it:

  • Air quality indicator: Lichens are incredibly sensitive to air pollution, so finding them means your garden enjoys relatively clean air
  • Ecosystem health: They contribute to biodiversity and serve as food for various small creatures
  • Natural beauty: Their unique texture and form add visual interest to tree bark and rock surfaces
  • Moisture regulation: They help maintain humidity levels in their immediate environment

How to Identify Fecund Jelly Lichen

Spotting Collema fecundum is easier than you might think once you know what to look for:

  • Wet appearance: When moist, it looks gelatinous and translucent with a brownish to olive-green color
  • Dry appearance: When dry, it appears as dark, crusty patches that might seem lifeless
  • Texture: Feels soft and jelly-like when wet, brittle when dry
  • Location: Found on tree bark, particularly in crevices and rough areas
  • Size: Forms small colonies, with individual lobes typically measuring just a few centimeters

Creating a Lichen-Friendly Environment

While you can’t plant lichens directly, you can certainly encourage their natural occurrence in your garden:

  • Maintain mature trees: Older trees with textured bark provide ideal surfaces
  • Avoid chemical treatments: Skip pesticides and fungicides that can harm these sensitive organisms
  • Preserve natural moisture: Don’t over-clean or power-wash tree bark
  • Keep air clean: Avoid burning materials or using harsh chemicals near potential lichen habitat

The Bottom Line

Fecund jelly lichen might not be the showstopper flower you planned to feature in your garden Instagram posts, but it’s a fascinating indicator of a healthy, balanced ecosystem. Rather than trying to remove or cultivate it, simply appreciate this remarkable organism for what it represents—a thriving, natural environment where the air is clean and the conditions are just right for one of nature’s most successful partnerships to flourish.

Next time you’re wandering through your garden after a rain shower, take a moment to look closely at your tree bark. You might just spot the glistening, jelly-like presence of Collema fecundum, quietly doing its part to keep your garden ecosystem healthy and balanced!

Fecund 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 fecundum Degel. - fecund 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