North America Native Plant

Tremella Haematommatis

Botanical name: Tremella haematommatis

USDA symbol: TRHA4

Habit: lichen

Native status: Native to North America  

Tremella haematommatis: The Tiny Orange Jelly Fungus in Your Backyard If you’ve ever spotted tiny, orange, jelly-like blobs on dead branches in your garden and wondered what on earth is that?, you might have encountered Tremella haematommatis. This curious little fungus is one of those fascinating organisms that most gardeners ...

Tremella haematommatis: The Tiny Orange Jelly Fungus in Your Backyard

If you’ve ever spotted tiny, orange, jelly-like blobs on dead branches in your garden and wondered what on earth is that?, you might have encountered Tremella haematommatis. This curious little fungus is one of those fascinating organisms that most gardeners overlook, but it’s actually playing an important role in your garden’s ecosystem.

What Exactly Is Tremella haematommatis?

Despite its intimidating scientific name, Tremella haematommatis is simply a type of jelly fungus native to North America. Unlike the plants we typically think about when gardening, this is a fungus that produces small, gelatinous, orange to reddish fruiting bodies. These little orange jellies are actually the reproductive structures of the fungus, similar to how mushrooms work for other fungi.

The fungus itself lives within decaying wood, where it spends most of its time breaking down organic matter and recycling nutrients back into the soil. Those colorful little blobs you see are just the tip of the iceberg!

Where You’ll Find This Orange Wonder

Tremella haematommatis is found throughout North America, thriving in forests and wooded areas where there’s plenty of decaying hardwood material. In your garden, you’re most likely to spot it on dead branches, fallen logs, or any decaying wood that’s been sitting around for a while.

How to Identify Tremella haematommatis

Spotting this little fungus is easier than pronouncing its name! Here’s what to look for:

  • Size: Very small, typically 2-10 millimeters across
  • Color: Bright orange to reddish-orange
  • Texture: Gelatinous and jelly-like, often described as rubbery
  • Location: Always found on dead hardwood, never on living trees
  • Season: Most visible during moist conditions, especially in fall and winter

Is It Beneficial for Your Garden?

Absolutely! While you can’t plant or cultivate Tremella haematommatis like a traditional garden plant, its presence is actually a sign of a healthy garden ecosystem. Here’s why this little fungus deserves your appreciation:

  • Acts as nature’s recycling crew, breaking down dead wood and returning nutrients to the soil
  • Helps prevent the accumulation of dead plant material that could harbor harmful pests
  • Indicates good moisture levels and organic matter in your garden
  • Provides food for various small insects and other decomposer organisms

Should You Encourage It?

The great news is that you don’t need to do anything special to grow this fungus. If you maintain a garden with some natural areas, leave fallen branches and logs to decompose naturally, and avoid using harsh chemicals, Tremella haematommatis and other beneficial decomposer fungi will likely show up on their own.

To create conditions where this and other beneficial fungi might thrive:

  • Leave some dead wood in less visible areas of your garden
  • Maintain adequate moisture in shaded areas
  • Avoid excessive use of fungicides
  • Create a natural composting area with organic debris

The Bottom Line

While Tremella haematommatis might not be the showstopper flower you planned to feature in your garden, it’s one of those quietly important organisms that keeps natural systems running smoothly. Next time you spot those tiny orange jellies on a dead branch, take a moment to appreciate this little decomposer doing its job. It’s a reminder that healthy gardens are complex ecosystems where even the smallest organisms play vital roles!

Rather than trying to remove or eliminate these fungi, consider them a sign that your garden is supporting biodiversity in ways you might not have expected. After all, the best gardens work with nature, not against it.

Tremella Haematommatis

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Basidiomycota - Basidiosporic fungi

Subdivision
Class

Basidiomycetes

Subclass

Phragmobasidiomycetidae

Order

Tremellales

Family

Tremellaceae Fr.

Genus

Tremella Pers.

Species

Tremella haematommatis Diederich

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