North America Native Plant

Lempholemma Lichen

Botanical name: Lempholemma

USDA symbol: LEMPH

Habit: lichen

Native status: Native to North America  

Discovering Lempholemma Lichen: A Tiny Wonder in Your Garden Have you ever noticed small, crusty patches on rocks or tree bark in your garden and wondered what they were? You might be looking at lempholemma lichen, a fascinating organism that’s more common than you think. While you won’t find this ...

Discovering Lempholemma Lichen: A Tiny Wonder in Your Garden

Have you ever noticed small, crusty patches on rocks or tree bark in your garden and wondered what they were? You might be looking at lempholemma lichen, a fascinating organism that’s more common than you think. While you won’t find this little guy at your local nursery, understanding what it is and why it appears can help you appreciate the hidden life thriving right in your outdoor space.

What Exactly Is Lempholemma Lichen?

Lempholemma lichen isn’t a plant in the traditional sense – it’s actually a remarkable partnership between fungi and algae working together as one organism. This collaboration creates those small, crusty patches you might spot on rocks, tree bark, or even soil surfaces. Think of it as nature’s ultimate roommate situation, where both partners benefit from the arrangement.

These lichens typically appear as thin, gray to brownish or blackish films or patches. They’re not particularly showy, but they’re quietly doing important work in your garden ecosystem.

Where You’ll Find Lempholemma Lichen

Lempholemma lichen is native to North America and can be found across temperate regions of the continent. You’re most likely to spot it in areas with good air quality, as lichens are notoriously sensitive to air pollution.

Is Lempholemma Lichen Beneficial for Your Garden?

While lempholemma lichen won’t attract butterflies or produce colorful blooms, it does offer some subtle benefits:

  • Acts as a natural air quality indicator – its presence suggests clean air in your garden
  • Contributes to soil formation by slowly breaking down rock surfaces over time
  • Provides food and shelter for tiny insects and other small creatures
  • Adds natural character and age to rock walls, stone features, and mature trees

How to Identify Lempholemma Lichen

Spotting lempholemma lichen takes a bit of detective work since it’s quite small and unassuming. Here’s what to look for:

  • Small, crusty or film-like patches on hard surfaces
  • Gray, brown, or blackish coloration
  • Typically found on rocks, tree bark, or occasionally soil
  • Smooth or slightly rough texture
  • No obvious plant-like structures (no leaves, stems, or flowers)

Should You Encourage Lempholemma Lichen?

The short answer is: you don’t need to do anything special! Lempholemma lichen appears naturally when conditions are right. You can’t plant it like a typical garden plant, and you don’t need to water or fertilize it. In fact, trying to help it might actually harm it.

If you want to create conditions where lichens like lempholemma might thrive, focus on:

  • Maintaining good air quality around your property
  • Avoiding harsh chemical sprays on rocks and tree bark
  • Including natural stone features in your landscape
  • Preserving mature trees with interesting bark

The Bottom Line

Lempholemma lichen is one of those quiet garden residents you might never notice unless you’re looking for it. While it won’t win any beauty contests, its presence indicates a healthy environment. Rather than viewing it as something to remove or encourage, think of it as a natural part of your garden’s ecosystem – a tiny reminder that nature is always finding ways to make the most of available space.

Next time you’re wandering through your garden, take a moment to look closely at your rocks and tree bark. You might be surprised by the miniature world of lichens living right under your nose!

Lempholemma Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lichinales

Family

Lichinaceae Nyl.

Genus

Lempholemma Körb. - lempholemma lichen

Species

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