North America Native Plant

Reed’s Bryum Moss

Botanical name: Bryum reedii

USDA symbol: BRRE5

Habit: nonvascular

Native status: Native to North America  

Reed’s Bryum Moss: A Critically Rare Native Treasure Worth Protecting Meet Reed’s bryum moss (Bryum reedii), one of North America’s most elusive native plants. This tiny green marvel belongs to the fascinating world of bryophytes – those ancient, non-flowering plants that include mosses, liverworts, and hornworts. But before you start ...

Rare plant alert!

Region: Conservation status by state

Status: S1: Status is uncertain but is somewhere between the following rankings: Critically Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 5 or fewer occurrences or very few remaining individuals (<1,000) ⚘

Reed’s Bryum Moss: A Critically Rare Native Treasure Worth Protecting

Meet Reed’s bryum moss (Bryum reedii), one of North America’s most elusive native plants. This tiny green marvel belongs to the fascinating world of bryophytes – those ancient, non-flowering plants that include mosses, liverworts, and hornworts. But before you start planning where to add this charming moss to your garden, there’s something crucial you need to know about this remarkable species.

Why Reed’s Bryum Moss is Special (and Rare)

Reed’s bryum moss holds a Global Conservation Status of S1, which means it’s critically imperiled. In plain English? This little moss is incredibly rare, with typically five or fewer known locations and fewer than 1,000 individual plants remaining in the wild. That makes it rarer than many animals we consider endangered!

As a native North American species, Reed’s bryum moss has been quietly doing its part in our ecosystems for countless years. However, its exact geographic distribution remains largely unknown to researchers, adding an air of mystery to this already fascinating plant.

What Makes It a Moss?

Like all mosses, Reed’s bryum moss is a bryophyte – a group of plants that were among the first to make the leap from water to land millions of years ago. Here’s what makes it special:

  • It’s completely herbaceous (no woody parts)
  • It often attaches itself to solid surfaces like rocks, dead wood, or living trees rather than growing in soil
  • It reproduces through spores rather than seeds
  • It plays a crucial role in preventing erosion and creating habitat for tiny creatures

Should You Try Growing Reed’s Bryum Moss?

Here’s where we need to have an important conversation. While the idea of cultivating this rare native moss might sound appealing, its critically imperiled status means it’s absolutely not appropriate for home gardening. Attempting to collect or grow Reed’s bryum moss could potentially harm the few remaining wild populations.

Instead of trying to grow this particular species, consider these moss-friendly alternatives for your garden:

  • Create conditions that welcome common native mosses naturally
  • Maintain areas of consistent moisture and partial shade
  • Avoid using chemicals that might harm moss communities
  • Leave some messy areas where mosses can establish on their own

How to Identify Reed’s Bryum Moss

If you’re lucky enough to encounter what might be Reed’s bryum moss in the wild, here’s what to look for:

  • Small, terrestrial moss forming low cushions or mats
  • Typically found attached to rocks, wood, or other solid surfaces
  • Herbaceous growth with the characteristic bryum moss appearance

However, proper identification of this species requires expertise and often microscopic examination. If you suspect you’ve found this rare moss, contact local botanists or conservation organizations rather than disturbing it.

The Bigger Picture: Why Rare Mosses Matter

You might wonder why such a tiny, seemingly insignificant plant deserves our attention. Mosses like Reed’s bryum moss are ecological workhorses that:

  • Help prevent soil erosion
  • Create microhabitats for insects and other small creatures
  • Contribute to nutrient cycling in their ecosystems
  • Serve as indicators of environmental health

The extreme rarity of Reed’s bryum moss makes it a conservation priority and a reminder of how much we still don’t know about the small but mighty plants sharing our world.

Supporting Moss Conservation

While you can’t grow Reed’s bryum moss in your garden, you can still support moss conservation:

  • Learn about and protect native plant communities in your area
  • Support organizations working on rare plant conservation
  • Create moss-friendly spaces in your garden for common species
  • Report any suspected rare moss sightings to local botanists

Reed’s bryum moss may be too rare and precious for our gardens, but it serves as an inspiring reminder of the incredible diversity of native plants right under our noses – sometimes literally! By understanding and respecting species like this critically imperiled moss, we become better stewards of the remarkable plant communities that call North America home.

Reed’s Bryum Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Bryales

Family

Bryaceae Rchb.

Genus

Bryum Hedw. - bryum moss

Species

Bryum reedii H. Rob. - Reed's bryum moss

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