North America Native Plant

Scoliciosporum Sarothamni

Botanical name: Scoliciosporum sarothamni

USDA symbol: SCSA7

Habit: lichen

Native status: Native to North America  

Scoliciosporum sarothamni: The Tiny Lichen You Never Knew Was in Your Garden Have you ever noticed tiny, crusty patches on the bark of shrubs in your garden and wondered what they were? You might be looking at Scoliciosporum sarothamni, a fascinating little lichen that’s more common than you’d think. While ...

Scoliciosporum sarothamni: The Tiny Lichen You Never Knew Was in Your Garden

Have you ever noticed tiny, crusty patches on the bark of shrubs in your garden and wondered what they were? You might be looking at Scoliciosporum sarothamni, a fascinating little lichen that’s more common than you’d think. While it doesn’t have a catchy common name, this North American native plays a quiet but important role in our local ecosystems.

What Exactly Is Scoliciosporum sarothamni?

Before we dive in, let’s clear up what we’re dealing with here. Scoliciosporum sarothamni isn’t a plant you can pick up at your local nursery – it’s a lichen. Think of lichens as nature’s ultimate partnership: they’re actually two organisms (a fungus and an alga) living together in perfect harmony. This particular species forms small, whitish to grayish crusty patches that you’ll typically find growing on the bark of various shrubs.

This lichen is native to North America, making it a true local resident that has been quietly doing its thing in our ecosystems for ages. You’ll most commonly spot it making itself at home on broom species (Sarothamnus), which is actually where it gets part of its scientific name.

Is This Lichen Good for Your Garden?

Here’s the thing about Scoliciosporum sarothamni – it’s not something you plant, but rather something that finds you. And when it does show up in your garden, it’s actually a pretty good sign! The presence of lichens often indicates good air quality, since these sensitive organisms are among the first to disappear when pollution levels rise.

While this lichen won’t add dramatic color or structure to your landscape design, it does contribute to your garden’s biodiversity in subtle ways:

  • Provides microhabitats for tiny insects and other small creatures
  • Contributes to the overall ecosystem health of your garden
  • Acts as a natural indicator of environmental conditions
  • Adds textural interest to bark surfaces when viewed up close

How to Identify Scoliciosporum sarothamni

Spotting this little lichen takes a keen eye, but once you know what to look for, you’ll start noticing it everywhere. Here’s your field guide to identification:

  • Appearance: Forms small, crusty patches that are typically whitish to light gray in color
  • Texture: Has a distinctly crusty or scaly surface (botanists call this crustose)
  • Location: Look for it on the bark of shrubs, especially broom species
  • Size: Individual patches are quite small, often just a few millimeters across
  • Growth pattern: Tends to form irregular, spreading patches rather than distinct shapes

Can You Encourage This Lichen in Your Garden?

Unlike traditional plants, you can’t exactly plant or cultivate Scoliciosporum sarothamni. Lichens have their own mysterious ways of showing up and establishing themselves. However, you can create conditions that might make your garden more lichen-friendly:

  • Maintain good air quality around your property
  • Avoid using harsh chemicals or fungicides that might harm these sensitive organisms
  • Keep some older shrubs and trees with textured bark
  • Be patient – lichens are slow growers and may take years to establish

The Bottom Line

Scoliciosporum sarothamni might not be the showstopper of your garden, but it’s definitely one of those quiet contributors that make our outdoor spaces more complete. If you spot these small, crusty patches on your shrubs, take a moment to appreciate this tiny example of nature’s collaboration. It’s a sign that your garden is supporting a diverse range of life, right down to the microscopic level.

Remember, the best gardens aren’t just about the plants we choose to grow – they’re also about the wild things that choose to grow with us. And sometimes, the smallest residents tell the biggest stories about the health and diversity of our outdoor spaces.

Scoliciosporum Sarothamni

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Lecanoraceae Körb.

Genus

Scoliciosporum A. Massal. - scoliciosporum lichen

Species

Scoliciosporum sarothamni (Vain.) Vezda

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