North America Native Plant

Destitute Rinodina Lichen

Botanical name: Rinodina destituta

USDA symbol: RIDE2

Habit: lichen

Native status: Native to North America  

Meet the Destitute Rinodina Lichen: A Tiny Wonder You Might Already Have If you’ve ever taken a close look at the rocks, tree bark, or even concrete surfaces around your garden, you might have encountered a small, crusty organism that looks like it’s been painted on with a rough brush. ...

Meet the Destitute Rinodina Lichen: A Tiny Wonder You Might Already Have

If you’ve ever taken a close look at the rocks, tree bark, or even concrete surfaces around your garden, you might have encountered a small, crusty organism that looks like it’s been painted on with a rough brush. Meet the destitute rinodina lichen (Rinodina destituta), a fascinating little life form that’s probably been quietly living in your outdoor spaces all along!

What Exactly Is a Lichen?

Before we dive into the specifics of our destitute friend, let’s clear up what a lichen actually is. Unlike plants, lichens are composite organisms made up of a fungus and an algae (or sometimes cyanobacteria) living together in a mutually beneficial relationship. Think of it as nature’s ultimate roommate situation – the fungus provides structure and protection, while the algae produces food through photosynthesis.

Getting to Know Rinodina destituta

The destitute rinodina lichen is a native North American species that belongs to a group called crustose lichens. These lichens form thin, crust-like growths that seem to be glued directly onto their host surface. Don’t let the name destitute fool you – while this lichen might appear humble, it’s actually quite remarkable in its ability to survive in harsh conditions.

This lichen typically appears as small, grayish to brownish patches with a somewhat rough, crusty texture. You’ll often find it growing on rocks, tree bark, and sometimes even on man-made surfaces like concrete or stone walls.

Is It Beneficial to Your Garden?

While you can’t exactly plant or cultivate the destitute rinodina lichen like you would a flower or shrub, its presence in your garden is actually a positive sign! Here’s why:

  • Air quality indicator: Lichens are sensitive to air pollution, so finding them in your garden suggests relatively clean air
  • Ecosystem support: They provide food and habitat for tiny insects and other small creatures
  • Soil formation: Over time, lichens help break down rocks and contribute to soil formation
  • Natural beauty: They add subtle texture and natural character to surfaces

How to Identify Destitute Rinodina Lichen

Spotting this lichen takes a bit of detective work, but here are the key features to look for:

  • Appearance: Thin, crusty patches that look painted on to surfaces
  • Color: Grayish to brownish, sometimes with a slightly greenish tint when moist
  • Texture: Rough and crusty, firmly attached to the substrate
  • Size: Individual patches are typically small, often just a few centimeters across
  • Location: Found on rocks, bark, and occasionally concrete surfaces

Living Alongside Lichens

The best approach to lichens in your garden is simply to appreciate them for what they are – ancient, resilient organisms that have been around for millions of years. You don’t need to do anything special to care for them, and trying to remove them is usually unnecessary and potentially harmful to the surfaces they’re growing on.

If you’re lucky enough to spot destitute rinodina lichen in your garden, take a moment to marvel at this tiny example of nature’s ingenuity. It’s a reminder that even the smallest organisms play important roles in our local ecosystems, quietly going about their business while adding to the rich tapestry of life in our outdoor spaces.

A Final Thought

Next time you’re wandering through your garden, take a closer look at those crusty patches on rocks and trees. You might just be looking at one of nature’s most successful partnerships, thriving right under your nose. The destitute rinodina lichen may be small and easily overlooked, but it’s a testament to the incredible diversity and resilience of the natural world – even in our own backyards.

Destitute Rinodina Lichen

Classification

Group

Lichen

Kingdom

Fungi - Fungi

Subkingdom
Superdivision
Division

Ascomycota - Sac fungi

Subdivision
Class

Ascomycetes

Subclass
Order

Lecanorales

Family

Physciaceae Zahlbr.

Genus

Rinodina (Ach.) A. Gray - rinodina lichen

Species

Rinodina destituta (Nyl.) Zahlbr. - destitute rinodina lichen

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