North America Native Plant

Lecanora Phaedrophthalma

Botanical name: Lecanora phaedrophthalma

USDA symbol: LEPH9

Habit: lichen

Native status: Native to North America  

Synonyms: Lecanora christoi W.A. Weber (LECH8)   

Discovering Lecanora phaedrophthalma: A Rocky Mountain Lichen Worth Knowing If you’ve ever wandered through rocky terrain in North America and noticed crusty, patch-like growths clinging to stone surfaces, you might have encountered Lecanora phaedrophthalma. This fascinating organism isn’t your typical garden plant – in fact, it’s not a plant at ...

Discovering Lecanora phaedrophthalma: A Rocky Mountain Lichen Worth Knowing

If you’ve ever wandered through rocky terrain in North America and noticed crusty, patch-like growths clinging to stone surfaces, you might have encountered Lecanora phaedrophthalma. This fascinating organism isn’t your typical garden plant – in fact, it’s not a plant at all! It’s a lichen, and understanding what makes it special can add a whole new dimension to your appreciation of native ecosystems.

What Exactly Is Lecanora phaedrophthalma?

Lecanora phaedrophthalma is a crustose lichen native to North America. Unlike the flowering plants we typically think about for our gardens, lichens are remarkable partnerships between fungi and algae (or sometimes cyanobacteria). The fungal partner provides structure and protection, while the algae creates food through photosynthesis. It’s nature’s perfect roommate situation!

This particular species is also known by its scientific synonym Lecanora christoi W.A. Weber, but don’t worry – you won’t need to remember that for your next nature hike.

Where You’ll Find This Lichen

As a North American native, Lecanora phaedrophthalma has carved out its niche in the rocky landscapes of the western regions, particularly in the Rocky Mountain areas. You’ll typically spot it growing directly on rock surfaces, especially siliceous rocks, where it forms thin, crusty patches that seem to merge seamlessly with the stone itself.

Is This Lichen Beneficial for Your Garden?

Here’s where things get interesting – and a bit different from your usual gardening advice. You can’t actually plant or cultivate Lecanora phaedrophthalma in your garden like you would a shrub or perennial. Lichens are wild organisms that establish themselves naturally over very long periods, sometimes taking decades to develop mature colonies.

However, if you’re lucky enough to have natural rock formations or stone features on your property, and this lichen appears on its own, consider it a gift! Lichens like this one serve several beneficial purposes:

  • They help break down rock surfaces over time, contributing to soil formation
  • They can indicate good air quality, as many lichens are sensitive to pollution
  • They provide habitat and food sources for various small creatures and insects
  • They add natural beauty and authenticity to wild landscapes

How to Identify Lecanora phaedrophthalma

Spotting this lichen requires a bit of detective work, but it’s part of the fun! Look for these characteristics:

  • Crusty, thin patches that appear almost painted onto rock surfaces
  • Growth primarily on siliceous (quartz-containing) rocks
  • Small, disc-like reproductive structures that may be visible with close inspection
  • Coloration that typically blends with the host rock

Remember, lichen identification can be tricky even for experts, so don’t worry if you’re not 100% certain. The joy is in the observation and learning process!

Respecting Wild Lichens

If you discover what might be Lecanora phaedrophthalma on your property, the best approach is simply to observe and appreciate it. These slow-growing organisms are easily damaged and take an incredibly long time to recover. Avoid walking on, touching, or attempting to transplant any lichen colonies you find.

Instead, consider yourself a steward of a tiny piece of wild North America right in your own landscape. Document it with photos, observe how it changes with seasons and weather, and enjoy the fact that your property supports these ancient and fascinating life forms.

While you can’t add this lichen to your shopping list for next spring’s garden makeover, discovering it naturally occurring in your landscape is like finding a hidden treasure – a reminder that some of nature’s most interesting inhabitants choose us, rather than the other way around.

Lecanora Phaedrophthalma

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Lecanoraceae Körb.

Genus

Lecanora Ach. - rim lichen

Species

Lecanora phaedrophthalma Poelt

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