North America Native Plant

Diplotomma Lichen

Botanical name: Diplotomma venustum

USDA symbol: DIVE5

Habit: lichen

Native status: Native to North America  

Synonyms: Buellia venusta (Körb.) Lettau (BUVE3)   

Diplotomma Lichen: A Tiny Natural 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 Diplotomma venustum, commonly known as diplotomma lichen. While it’s not something you can plant like your ...

Diplotomma Lichen: A Tiny Natural 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 Diplotomma venustum, commonly known as diplotomma lichen. While it’s not something you can plant like your typical garden flowers, this fascinating organism plays an important role in healthy ecosystems and might already be quietly residing in your outdoor space!

What Exactly is Diplotomma Lichen?

Diplotomma lichen isn’t actually a plant at all – it’s a unique partnership between a fungus and an algae (or sometimes cyanobacteria) living together in perfect harmony. This amazing collaboration, known as symbiosis, allows the lichen to create its own food through photosynthesis while the fungal partner provides structure and protection. Think of it as nature’s ultimate roommate situation!

Previously known by the scientific synonym Buellia venusta, this North American native lichen forms small, crusty patches that can add subtle texture and visual interest to natural garden settings.

Where You’ll Find Diplotomma Lichen

As a native species to North America, diplotomma lichen has been quietly thriving in our ecosystems for countless years. While specific distribution details vary, you’re most likely to spot this lichen in temperate regions across the continent.

Is Diplotomma Lichen Beneficial for Your Garden?

Absolutely! While you won’t be planting diplotomma lichen like you would a tomato or rose bush, its presence in your garden is actually a wonderful sign. Here’s why you should appreciate these tiny organisms:

  • Air quality indicator: Lichens are incredibly sensitive to air pollution, so their presence suggests you have relatively clean air in your garden
  • Ecosystem health marker: A diverse lichen community indicates a balanced, healthy environment
  • Natural beauty: These crusty formations add subtle texture and demonstrate nature’s incredible diversity
  • Wildlife habitat: While small, lichens can provide food and shelter for tiny insects and other microorganisms

How to Identify Diplotomma Lichen

Spotting diplotomma lichen requires a keen eye, as these organisms are quite small. Here’s what to look for:

  • Appearance: Forms small, crusty patches with a distinctive texture
  • Location: Grows on rocks, tree bark, and other hard surfaces
  • Size: Usually quite small, often just a few centimeters across
  • Texture: Has a crusty, somewhat rough appearance rather than leafy or branched

Remember, proper identification often requires close examination and sometimes microscopic features, so don’t worry if you’re not 100% certain about what you’re seeing!

Creating a Lichen-Friendly Garden

While you can’t plant lichens directly, you can create conditions that encourage their natural establishment:

  • Maintain clean air: Avoid excessive use of chemicals and support air quality improvement efforts
  • Provide suitable surfaces: Leave some natural rocks, old wood, or mature tree bark undisturbed
  • Practice patience: Lichens grow extremely slowly, so it may take years for them to establish
  • Minimize disturbance: Avoid cleaning or scrubbing surfaces where lichens might grow

The Bottom Line on Diplotomma Lichen

Diplotomma lichen represents one of nature’s most fascinating partnerships, and its presence in your garden is something to celebrate rather than eliminate. While you won’t find it at your local nursery, appreciating and protecting the lichens that naturally occur in your landscape helps support biodiversity and indicates a healthy environment.

Next time you’re wandering through your garden, take a moment to look closely at those rocks and tree trunks. You might just discover a whole miniature world of lichens, including the subtle beauty of diplotomma lichen, quietly contributing to your garden’s ecosystem health!

Diplotomma Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Physciaceae Zahlbr.

Genus

Diplotomma Flotow - diplotomma lichen

Species

Diplotomma venustum (Körb.) Körb. - diplotomma lichen

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