North America Native Plant

Hulten’s Crabseye Lichen

Botanical name: Ochrolechia subplicans hultenii

USDA symbol: OCSUH

Habit: lichen

Native status: Native to North America  

Synonyms: Pertusaria hultenii Erichsen (PEHU7)   

Discovering Hulten’s Crabseye Lichen in Your Garden If you’ve ever noticed crusty, circular patches growing on rocks or tree bark and wondered what they were, you might have encountered a lichen! Today, we’re diving into the fascinating world of Hulten’s crabseye lichen (Ochrolechia subplicans hultenii), a native North American species ...

Discovering Hulten’s Crabseye Lichen in Your Garden

If you’ve ever noticed crusty, circular patches growing on rocks or tree bark and wondered what they were, you might have encountered a lichen! Today, we’re diving into the fascinating world of Hulten’s crabseye lichen (Ochrolechia subplicans hultenii), a native North American species that’s more common than you might think.

What Exactly is Hulten’s Crabseye Lichen?

Hulten’s crabseye lichen isn’t actually a plant at all – it’s a remarkable partnership between fungi and algae working together as one organism. This collaboration creates those interesting crusty growths you might spot in natural areas. Sometimes you’ll see it listed under its scientific synonym, Pertusaria hultenii, but don’t let that confuse you – it’s the same fascinating organism.

As a native species to North America, this lichen has been quietly doing its job in our ecosystems for countless years, often going unnoticed by casual observers.

Where You’ll Find This Lichen

While specific distribution details for Hulten’s crabseye lichen are limited in readily available sources, it belongs to a group of lichens native to North America. Like most lichens, it likely prefers specific environmental conditions and substrates where it can establish its unique fungal-algae partnership.

Is This Lichen Good for Your Garden?

Here’s where lichens get interesting for gardeners – they’re actually fantastic indicators of environmental health! Finding lichens like Hulten’s crabseye lichen in your garden area is generally a positive sign that your local ecosystem is relatively clean and balanced.

Lichens provide several benefits:

  • They indicate good air quality in your area
  • They don’t harm the surfaces they grow on
  • They add natural texture and visual interest to rocks and bark
  • They’re part of the complex web of life that supports biodiversity

How to Identify Hulten’s Crabseye Lichen

Identifying specific lichen species can be tricky, even for experts! Hulten’s crabseye lichen belongs to the crustose lichen group, meaning it forms a crust-like growth that’s tightly attached to its growing surface. Without specialized equipment and expertise, distinguishing it from closely related species in the field can be challenging.

If you’re curious about lichens in your garden, consider:

  • Taking photos and consulting with local naturalist groups
  • Joining citizen science projects that document local lichen populations
  • Simply appreciating these fascinating organisms for their ecological role

Living Alongside Garden Lichens

The best approach to lichens in your garden is simply to let them be. They’re not weeds to remove or problems to solve – they’re indicators of a healthy environment. If you spot what might be Hulten’s crabseye lichen or other lichens in your garden, consider yourself lucky to have such clean conditions that these sensitive organisms can thrive.

Remember, lichens grow incredibly slowly and can live for decades or even centuries. That crusty patch on your favorite garden rock might be older than you think!

Hulten’s Crabseye Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Pertusariaceae Körb.

Genus

Ochrolechia A. Massal. - crabseye lichen

Species

Ochrolechia subplicans (Nyl.) Brodo - crabseye lichen

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