North America Native Plant

Lecidea Lichen

Botanical name: Lecidea micytho

USDA symbol: LEMI17

Habit: lichen

Native status: Native to North America  

Lecidea Lichen: A Mysterious Member of Your Garden’s Hidden Community Have you ever noticed tiny, crusty patches on rocks, tree bark, or even concrete surfaces in your garden and wondered what they were? You might be looking at lichens – fascinating composite organisms that are neither plant nor animal, but ...

Lecidea Lichen: A Mysterious Member of Your Garden’s Hidden Community

Have you ever noticed tiny, crusty patches on rocks, tree bark, or even concrete surfaces in your garden and wondered what they were? You might be looking at lichens – fascinating composite organisms that are neither plant nor animal, but something wonderfully unique. Today, we’re diving into the world of Lecidea micytho, commonly known as lecidea lichen, a North American native that represents one of nature’s most intriguing partnerships.

What Exactly Is a Lichen?

Before we get into the specifics of lecidea lichen, let’s clear up what lichens actually are. Think of them as nature’s ultimate roommates – they’re made up of a fungus and an algae (or sometimes a cyanobacterium) living together in perfect harmony. The fungus provides structure and protection, while the algae photosynthesizes to create food for both partners. It’s like having a built-in chef and landlord all in one!

Lecidea micytho belongs to the Lecidea genus, which includes crustose lichens – the ones that form those thin, crusty patches that seem to be painted directly onto surfaces. They’re so tightly attached to their substrate that trying to remove them would likely damage both the lichen and whatever it’s growing on.

Where You’ll Find Lecidea Lichen

As a North American native, lecidea lichen has been quietly going about its business on this continent long before any of us started worrying about garden design. These hardy organisms can pop up in various locations throughout their native range, though specific distribution details for this particular species remain somewhat mysterious in the scientific literature.

Is Lecidea Lichen Good for Your Garden?

Here’s the thing about lichens – they’re not something you plant, but rather something that appears when conditions are just right. And that’s actually fantastic news for your garden! Here’s why:

  • Air quality indicators: Lichens are incredibly sensitive to air pollution, so their presence often indicates clean, healthy air in your garden space
  • Ecosystem builders: They help create soil by slowly breaking down rock surfaces over time
  • Wildlife support: Many birds use lichens as nesting material, and some small creatures find shelter among lichen communities
  • Natural beauty: They add subtle texture and color variations to otherwise plain surfaces

How to Identify Lecidea Lichen

Identifying specific lichen species can be tricky business – even experts sometimes need a microscope and chemical tests to be certain! However, if you’re curious about the lichens in your garden, here are some general characteristics to look for in Lecidea species:

  • Crustose (crusty) growth form that’s tightly attached to the surface
  • Often grayish, whitish, or sometimes yellowish coloration
  • Small, disc-shaped reproductive structures (called apothecia) that may appear as tiny dots
  • Preference for hard surfaces like rocks, bark, or even concrete

Creating Lichen-Friendly Conditions

While you can’t exactly plant lecidea lichen, you can create conditions that welcome lichens to your garden naturally:

  • Reduce air pollution: Avoid using chemical sprays and encourage car-free zones in your garden area
  • Provide surfaces: Leave some natural rock surfaces, old wood, or even concrete areas undisturbed
  • Maintain moisture: Lichens need some humidity, so areas that get morning dew or gentle misting are ideal
  • Practice patience: Lichens grow very slowly – we’re talking millimeters per year – so any lichen community is a sign of a stable, undisturbed environment

Living Alongside Garden Lichens

The best approach to lichens in your garden is simply to appreciate them as part of your local ecosystem. They’re doing important work – cleaning your air, creating habitat, and adding to the biodiversity of your space. Plus, they’re basically maintenance-free garden residents!

If you spot what you think might be lecidea lichen or other lichens in your garden, take a moment to observe these fascinating organisms up close. They represent millions of years of evolutionary cooperation and are quietly contributing to the health of your outdoor space. In a world where we’re always trying to add more to our gardens, sometimes the best thing we can do is simply appreciate what nature has already provided.

Lecidea Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Lecideaceae Chevall.

Genus

Lecidea Ach. - lecidea lichen

Species

Lecidea micytho Tuck. - lecidea lichen

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