North America Native Plant

Riccia Dictyospora

Botanical name: Riccia dictyospora

USDA symbol: RIDI7

Habit: nonvascular

Native status: Native to North America  

Riccia dictyospora: A Tiny Native Liverwort You Might Already Have If you’ve ever noticed tiny, flat green patches growing on moist soil or rocks in your garden, you might have encountered a liverwort – and possibly even the native species Riccia dictyospora. This diminutive plant belongs to an ancient group ...

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 ⚘

Riccia dictyospora: A Tiny Native Liverwort You Might Already Have

If you’ve ever noticed tiny, flat green patches growing on moist soil or rocks in your garden, you might have encountered a liverwort – and possibly even the native species Riccia dictyospora. This diminutive plant belongs to an ancient group of bryophytes that have been quietly doing their thing on Earth for over 400 million years!

What Exactly Is Riccia dictyospora?

Riccia dictyospora is a liverwort, which means it’s neither a moss nor a traditional flowering plant. Think of liverworts as the understated cousins of the plant world – they’re small, low-growing, and often overlooked, but they play important ecological roles. This particular species is native to North America, making it a legitimate part of our natural heritage.

Unlike the plants most gardeners are familiar with, liverworts don’t have true roots, stems, or leaves. Instead, they have simple, flattened structures called thalli that lie close to the ground. They’re part of the bryophyte family, which also includes mosses and hornworts.

Where You’ll Find This Little Guy

As a North American native, Riccia dictyospora has been quietly inhabiting our continent long before European settlers arrived. However, specific details about its exact range and distribution are still being studied by botanists – liverworts don’t get quite the same attention as showy wildflowers!

Is It Good for Your Garden?

Here’s where things get interesting. While you probably won’t be rushing out to plant Riccia dictyospora intentionally, discovering it in your garden is actually a good sign! Liverworts like this one indicate:

  • Healthy soil moisture levels
  • Good air quality (bryophytes are sensitive to pollution)
  • A thriving ecosystem that supports diverse plant life
  • Natural processes at work in your landscape

These tiny plants also contribute to soil stability and can help prevent erosion on bare patches of earth. They’re part of nature’s cleanup crew, quietly improving conditions for other plants.

How to Identify Riccia dictyospora

Spotting this liverwort requires getting down to ground level – literally! Look for:

  • Small, flat, green patches on moist soil or rock surfaces
  • A somewhat crusty or scale-like appearance
  • Growth that hugs the ground closely
  • Presence in areas that stay consistently moist

Keep in mind that identifying specific liverwort species often requires a magnifying glass and considerable expertise, as many species look quite similar to the naked eye.

A Conservation Consideration

Riccia dictyospora has a conservation status of S3?, which means its population status is somewhat uncertain. This doesn’t mean it’s endangered, but it does remind us that even small, seemingly insignificant plants deserve our respect and protection. If you find liverworts in your garden, consider yourself lucky to be hosting these ancient life forms!

Living Harmoniously with Liverworts

Rather than trying to cultivate Riccia dictyospora, the best approach is to create conditions where it might naturally appear:

  • Maintain areas of consistent moisture without waterlogging
  • Avoid excessive use of chemicals that might harm sensitive bryophytes
  • Leave some bare soil or rock surfaces where liverworts can establish
  • Practice organic gardening methods that support overall ecosystem health

Remember, these tiny plants are part of the complex web of life that makes healthy ecosystems tick. While they might not win any beauty contests, they’re doing important work behind the scenes – just like so many unsung heroes in the natural world!

Next time you’re in your garden, take a moment to look down at ground level. You might be surprised by the miniature world of bryophytes thriving right under your nose, including possibly the native Riccia dictyospora!

Riccia Dictyospora

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 dictyospora M. Howe

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