North America Native Plant

Asterophoma Lichen

Botanical name: Asterophoma mazaediicola

USDA symbol: ASMA20

Habit: lichen

Native status: Native to North America  

Asterophoma Lichen: A Mysterious North American Native Have you ever spotted tiny, crusty growths on tree bark or rocks and wondered what they were? You might have encountered a lichen! Today, we’re diving into the fascinating world of Asterophoma mazaediicola, commonly known as asterophoma lichen – a native North American ...

Asterophoma Lichen: A Mysterious North American Native

Have you ever spotted tiny, crusty growths on tree bark or rocks and wondered what they were? You might have encountered a lichen! Today, we’re diving into the fascinating world of Asterophoma mazaediicola, commonly known as asterophoma lichen – a native North American species that’s more mysterious than your average garden plant.

What Exactly Is Asterophoma Lichen?

Before we go any further, let’s clear up what we’re dealing with here. Asterophoma lichen isn’t actually a plant at all! Lichens are remarkable composite organisms made up of a fungus and an algae (or sometimes cyanobacteria) living together in a mutually beneficial relationship. Think of it as nature’s ultimate roommate situation – the fungus provides structure and protection, while the algae produces food through photosynthesis.

This particular species, Asterophoma mazaediicola, is native to North America, making it a true local character in our ecosystems.

Where Does It Call Home?

While specific distribution details for this species are limited in available resources, we know it’s a North American native. Like many lichens, it likely has specific habitat preferences and environmental requirements that determine where you’ll find it thriving.

Is It Beneficial for Your Garden?

Here’s where things get interesting! While you can’t exactly plant asterophoma lichen like you would a flower or shrub, lichens can be incredibly beneficial for garden ecosystems:

  • They’re excellent air quality indicators – healthy lichen populations often signal clean air
  • They contribute to biodiversity in your garden ecosystem
  • They can add subtle texture and visual interest to tree bark and rock surfaces
  • They play important ecological roles in nutrient cycling

How to Spot Asterophoma Lichen

Identifying specific lichen species can be tricky business, even for experts! Without detailed morphological information readily available for this particular species, general lichen identification tips include:

  • Look for crusty, leafy, or branching growths on bark, rocks, or soil
  • Note the color, texture, and substrate (what it’s growing on)
  • Pay attention to any reproductive structures
  • Consider the habitat and environmental conditions

For accurate identification of Asterophoma mazaediicola specifically, you’d likely need to consult with a lichenologist or mycologist, as many lichen species require microscopic examination for definitive identification.

Creating a Lichen-Friendly Garden

While you can’t plant asterophoma lichen directly, you can create conditions that welcome lichens to your garden:

  • Maintain good air quality (avoid excessive pollution and chemicals)
  • Preserve mature trees with textured bark
  • Include natural stone elements
  • Avoid excessive cleaning or scrubbing of bark and stone surfaces
  • Be patient – lichens grow very slowly!

The Bottom Line

Asterophoma lichen represents the incredible diversity of organisms that make up our native ecosystems. While it’s not something you’ll find at your local nursery, appreciating and protecting these fascinating composite organisms is part of being a thoughtful gardener and environmental steward. If you spot what you think might be this lichen in your garden, consider yourself lucky to be hosting such an intriguing native species!

Remember, the world of lichens is vast and complex, and proper identification often requires expert knowledge. But that doesn’t mean we can’t appreciate these remarkable organisms and the important roles they play in our native ecosystems.

Asterophoma Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Caliciales

Family

Mycocaliciaceae A.F.W. Schmidt

Genus

Asterophoma D. Hawksw. - asterophoma lichen

Species

Asterophoma mazaediicola D. Hawksw. - asterophoma lichen

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