North America Native Plant

Ravenel’s Cryphaea Moss

Botanical name: Cryphaea ravenelii

USDA symbol: CRRA7

Habit: nonvascular

Native status: Native to North America  

Discovering Ravenel’s Cryphaea Moss: A Tiny Native Treasure If you’ve ever taken a close look at the bark of trees in the southeastern United States, you might have encountered a tiny, often overlooked native resident: Ravenel’s cryphaea moss (Cryphaea ravenelii). This diminutive moss may not grab attention like showy wildflowers ...

Rare plant alert!

Region: Conservation status by state

Status: S3?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Vulnerable: Either very rare and local throughout its range, found only in a restricted range (even if abundant at some locations), or factors are making it vulnerable to extinction. Typically 21 to 100 occurrences or between 3,000 and 10,000 individuals ⚘

Discovering Ravenel’s Cryphaea Moss: A Tiny Native Treasure

If you’ve ever taken a close look at the bark of trees in the southeastern United States, you might have encountered a tiny, often overlooked native resident: Ravenel’s cryphaea moss (Cryphaea ravenelii). This diminutive moss may not grab attention like showy wildflowers or towering native trees, but it plays its own quiet role in our native ecosystems.

What Exactly Is Ravenel’s Cryphaea Moss?

Ravenel’s cryphaea moss is a small, branching moss that belongs to the diverse world of bryophytes—those ancient, non-flowering plants that have been around far longer than most of the plants we typically think about for our gardens. Unlike the mosses you might find carpeting the forest floor, this particular species has a preference for making its home on tree bark and dead wood rather than soil.

As a native North American species, this moss has adapted perfectly to life in the humid, shaded environments of the southeastern states. It’s what botanists call an epiphyte—a plant that grows on other plants (in this case, trees) without being parasitic.

Where Can You Find It?

Ravenel’s cryphaea moss calls the southeastern United States home, with documented populations particularly in South Carolina and surrounding states. It thrives in the region’s characteristic humid climate and dense woodlands.

Why Should Gardeners Care About This Tiny Moss?

While you probably won’t be rushing to your local nursery to buy Ravenel’s cryphaea moss for your landscape design, there are several reasons why this little native deserves your attention:

  • Biodiversity indicator: The presence of native mosses like this one indicates a healthy, functioning ecosystem
  • Educational value: It’s a great example of how native plants adapt to specific niches
  • Conservation awareness: This moss has a somewhat uncertain conservation status, reminding us that even small, inconspicuous species need our attention

A Note About Rarity

Here’s something important to know: Ravenel’s cryphaea moss has a Global Conservation Status of S3?, which indicates some level of uncertainty about its population status. This means that while it may not be immediately threatened, we don’t have complete information about how common or rare it actually is. This uncertainty makes it all the more important to appreciate and protect the native habitats where it naturally occurs.

How to Identify Ravenel’s Cryphaea Moss

Spotting this moss in the wild requires a keen eye and possibly a hand lens, as it’s quite small. Look for:

  • Small, branching moss growing on tree bark or dead wood
  • Preference for shaded, humid locations
  • Attachment to solid surfaces rather than soil
  • Presence in southeastern woodland environments

Supporting Native Moss Communities

Rather than trying to cultivate Ravenel’s cryphaea moss (which would be quite challenging anyway), the best way to support this species is to:

  • Preserve existing native woodlands and forest habitats
  • Maintain natural moisture levels in wooded areas
  • Avoid disturbing fallen logs and tree bark where mosses naturally grow
  • Support conservation efforts for southeastern forest ecosystems

The Bigger Picture

While Ravenel’s cryphaea moss might seem insignificant in the grand scheme of native gardening, it represents something important: the incredible diversity of native plants that exist beyond our typical garden favorites. Every native species, no matter how small or inconspicuous, plays a role in the complex web of relationships that make up healthy ecosystems.

So the next time you’re walking through a southeastern woodland, take a moment to look closely at the tree bark around you. You might just spot this tiny native treasure quietly doing its part to maintain the rich biodiversity of our native landscapes.

Ravenel’s Cryphaea Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Leucodontales

Family

Cryphaeaceae Schimp.

Genus

Cryphaea F. Weber - cryphaea moss

Species

Cryphaea ravenelii Austin - Ravenel's cryphaea moss

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