North America Native Plant

Riccia Sorocarpa

Botanical name: Riccia sorocarpa

USDA symbol: RISO2

Habit: nonvascular

Native status: Native to North America  

Riccia sorocarpa: The Tiny Liverwort Making a Big Difference in Your Garden Have you ever noticed those small, flat, green patches growing in the moist corners of your garden and wondered what they were? You might have stumbled upon Riccia sorocarpa, a fascinating little liverwort that’s been quietly doing important ...

Riccia sorocarpa: The Tiny Liverwort Making a Big Difference in Your Garden

Have you ever noticed those small, flat, green patches growing in the moist corners of your garden and wondered what they were? You might have stumbled upon Riccia sorocarpa, a fascinating little liverwort that’s been quietly doing important work in North American landscapes for centuries.

What Exactly is Riccia sorocarpa?

Riccia sorocarpa is a bryophyte – specifically a liverwort – which puts it in the same family as mosses and hornworts. These aren’t your typical flowering plants! Instead, they’re some of nature’s most ancient green plants, having been around for over 400 million years. Think of them as the wise elders of the plant kingdom.

This particular liverwort forms small, flat, ribbon-like structures called thalli that spread across the ground in delicate rosettes or mats. The plant is entirely herbaceous and has a knack for attaching itself to rocks, dead wood, or other solid surfaces rather than growing directly in soil.

Where You’ll Find This Native Beauty

As a native North American species, Riccia sorocarpa has earned its place in our local ecosystems. While it can be found across temperate regions of the continent, it tends to prefer the quieter, more sheltered spots in nature.

Spotting Riccia sorocarpa in the Wild

Identifying this liverwort is like learning to spot a subtle piece of natural art. Here’s what to look for:

  • Small, flat, green ribbon-like structures growing close to the ground
  • Plants that form rosette or mat-like patterns
  • Growth on rocks, logs, or other solid surfaces in moist areas
  • Bright green coloration when moist, possibly brownish when dry
  • No true leaves, stems, or flowers – just simple, flat plant bodies

Is Riccia sorocarpa Beneficial for Your Garden?

While you might not be able to plant Riccia sorocarpa like you would a flowering perennial, its presence in your garden is actually a wonderful sign! Here’s why you should appreciate these tiny green companions:

First, they’re excellent indicators of environmental health. Finding liverworts like Riccia sorocarpa suggests you have good air quality and appropriate moisture levels in your garden – they’re quite sensitive to pollution and environmental changes.

These little plants also play important ecological roles. They help prevent soil erosion, contribute to nutrient cycling, and provide habitat for tiny invertebrates. They’re part of what scientists call cryptobiotic soil crusts – living carpets that help stabilize and enrich the soil.

Creating Liverwort-Friendly Garden Spaces

Rather than trying to cultivate Riccia sorocarpa directly, you can encourage its natural appearance by creating the right conditions:

  • Maintain moist, shaded areas in your garden
  • Leave some rocks, logs, or stone surfaces available
  • Avoid using chemicals or disturbing areas where you spot these plants
  • Ensure good air circulation without letting areas completely dry out

A Living Connection to Ancient Times

When you spot Riccia sorocarpa in your garden, take a moment to appreciate that you’re looking at one of nature’s most enduring success stories. These humble liverworts have been quietly supporting ecosystems since long before flowering plants existed, and they continue to play their important role today.

So the next time you’re walking through your garden and notice those small green patches, remember – you’re not just looking at a simple plant, but at a tiny piece of living history that’s actively contributing to your garden’s health and biodiversity.

Riccia Sorocarpa

Classification

Group

Liverwort

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Hepaticophyta - Liverworts

Subdivision

Hepaticae

Class

Hepaticopsida

Subclass

Marchantiae

Order

Marchantiales

Family

Ricciaceae Rchb.

Genus

Riccia L., nom. cons.

Species

Riccia sorocarpa Bisch.

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