North America Native Plant

Nadvornik’s Horsehair Lichen

Botanical name: Bryoria nadvornikiana

USDA symbol: BRNA60

Habit: lichen

Native status: Native to North America  

Synonyms: Alectoria altaica (Gyel.) Rasanen (ALAL10)  ⚘  Alectoria nadvornikiana Gyel. (ALNA2)   

Nadvornik’s Horsehair Lichen: A Fascinating Forest Dweller You Might Spot in Your Yard Have you ever noticed what looks like grayish-green hair hanging from tree branches in your garden or local forest? You might be looking at Nadvornik’s horsehair lichen, a remarkable organism that’s more common than you might think. ...

Nadvornik’s Horsehair Lichen: A Fascinating Forest Dweller You Might Spot in Your Yard

Have you ever noticed what looks like grayish-green hair hanging from tree branches in your garden or local forest? You might be looking at Nadvornik’s horsehair lichen, a remarkable organism that’s more common than you might think. While you can’t exactly plant this fascinating species in your garden, understanding what it is and why it matters can help you appreciate the complex ecosystem right in your own backyard.

What Exactly Is Nadvornik’s Horsehair Lichen?

Nadvornik’s horsehair lichen (Bryoria nadvornikiana) isn’t actually a plant at all—it’s a lichen! This means it’s a unique partnership between a fungus and algae (or sometimes cyanobacteria) working together in perfect harmony. The scientific name might be a mouthful, but this species was previously known by other names including Alectoria altaica and Alectoria nadvornikiana, so don’t be surprised if you see those names in older field guides.

This native North American species creates those distinctive hair-like strands that dangle from tree branches, looking remarkably similar to coarse horsehair—hence the common name. The strands are typically grayish-green to brownish in color and can create quite a dramatic, almost mystical appearance when they’re abundant on trees.

Where You’ll Find This Curious Organism

Nadvornik’s horsehair lichen calls the boreal and montane regions of North America home, where it thrives in coniferous forests. You’re most likely to spot it hanging from the branches of spruce, fir, and pine trees, where it absorbs moisture and nutrients directly from the air.

Is It Good for Your Garden?

While you can’t cultivate Nadvornik’s horsehair lichen like you would a traditional garden plant, having it show up naturally in your landscape is actually a wonderful sign! Here’s why you should be thrilled to find it:

  • Air quality indicator: Lichens are incredibly sensitive to air pollution, so their presence indicates you have clean, healthy air
  • Ecosystem health: A thriving lichen population suggests a balanced, functioning ecosystem
  • Wildlife habitat: Many birds use lichen for nesting material, and some animals may browse on it
  • Natural beauty: These ethereal strands add a mystical, forest-like quality to mature trees

How to Identify Nadvornik’s Horsehair Lichen

Spotting this lichen is easier than you might think once you know what to look for:

  • Appearance: Long, hair-like strands that hang from tree branches
  • Color: Grayish-green to brownish, sometimes with a slight yellowish tint
  • Texture: Resembles coarse hair or thin rope
  • Location: Typically found on coniferous trees, especially spruce and fir
  • Growth pattern: Hangs in pendulous clusters from branches

Creating a Lichen-Friendly Environment

While you can’t plant Nadvornik’s horsehair lichen, you can create conditions that might encourage it and other lichens to colonize your space naturally:

  • Maintain mature trees, especially native conifers
  • Avoid using pesticides and chemicals that pollute the air
  • Keep your landscape as natural as possible
  • Be patient—lichens grow very slowly and may take years to establish

A Word of Caution

If you’re lucky enough to have Nadvornik’s horsehair lichen growing naturally on your trees, resist the urge to harvest or disturb it. These organisms grow incredibly slowly—we’re talking decades—and they’re sensitive to environmental changes. Simply enjoy them where they are and consider yourself fortunate to have such a pristine environment!

Remember, the presence of lichens like Nadvornik’s horsehair lichen is nature’s way of telling you that your local ecosystem is healthy and thriving. So next time you spot those mysterious hair-like strands hanging from your trees, take a moment to appreciate these remarkable organisms that have been quietly doing their part to keep our world in balance.

Nadvornik’s Horsehair Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Parmeliaceae F. Berchtold & J. Presl

Genus

Bryoria Brodo & D. Hawksw. - horsehair lichen

Species

Bryoria nadvornikiana (Gyel.) Brodo & D. Hawksw. - Nadvornik's horsehair lichen

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