North America Native Plant

Scotter’s Tortula Moss

Botanical name: Tortula scotteri

USDA symbol: TOSC4

Habit: nonvascular

Native status: Native to North America  

Synonyms: Hilpertia scotteri (R.H. Zander & Steere) R.H. Zander (HISC6)   

Scotter’s Tortula Moss: A Critically Rare Native Treasure Have you ever wondered about the tiny green carpets that sometimes grace rocks and tree bark in natural areas? Meet Scotter’s tortula moss (Tortula scotteri), one of North America’s most elusive and endangered bryophytes. This isn’t your typical garden plant – in ...

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) ⚘

Scotter’s Tortula Moss: A Critically Rare Native Treasure

Have you ever wondered about the tiny green carpets that sometimes grace rocks and tree bark in natural areas? Meet Scotter’s tortula moss (Tortula scotteri), one of North America’s most elusive and endangered bryophytes. This isn’t your typical garden plant – in fact, it’s so rare that you’re more likely to spot a shooting star than encounter this little green gem in the wild.

What Exactly Is Scotter’s Tortula Moss?

Scotter’s tortula moss belongs to the fascinating world of bryophytes – those ancient, non-flowering plants that include mosses, liverworts, and hornworts. Unlike the flashy flowering plants that dominate our gardens, this humble moss is a terrestrial species that prefers to attach itself to solid surfaces like rocks, tree bark, or decaying wood rather than growing directly in soil.

You might also see this species listed under its scientific synonym, Hilpertia scotteri, but don’t let the name game fool you – we’re talking about the same incredibly rare plant.

A Vanishing Act: The Rarity Crisis

Here’s where things get serious, fellow nature lovers. Scotter’s tortula moss carries a Global Conservation Status of S1, which translates to Critically Imperiled. This designation means we’re looking at a species with typically five or fewer known occurrences worldwide, with fewer than 1,000 individual plants remaining. To put this in perspective, this moss is rarer than many animals you’d find in a zoo!

Where in the World Is Scotter’s Tortula Moss?

This native North American species has an extremely limited range, though specific distribution details remain somewhat mysterious – much like the moss itself. The exact locations where this species can be found are closely guarded secrets in the botanical world, partly to protect the remaining populations from disturbance.

Should You Try to Grow It in Your Garden?

Here’s the short answer: absolutely not, and here’s why. With its critically imperiled status, attempting to collect or cultivate Scotter’s tortula moss would be both ecologically irresponsible and likely illegal in many areas. Even if you could somehow obtain it through responsible channels, the specific growing conditions this moss requires remain largely unknown to science.

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

  • Create habitat for common native mosses by maintaining shaded, moist areas
  • Leave fallen logs and rocks undisturbed to provide natural moss colonization sites
  • Reduce lawn areas to allow native bryophytes to establish naturally
  • Support conservation efforts for rare species through native plant societies

Identifying This Rare Gem

If you’re lucky enough to be a botanist or serious naturalist who might encounter this species in the field, identification requires expert knowledge and often microscopic examination. Like many mosses, Tortula scotteri is best identified by specialists who can examine its cellular structure and reproductive features.

The Bigger Picture: Why Rare Mosses Matter

You might wonder why we should care about such a tiny, obscure plant. Mosses like Scotter’s tortula moss play crucial roles in their ecosystems, helping to prevent soil erosion, providing habitat for microscopic wildlife, and contributing to the complex web of biodiversity that keeps our natural world functioning. When we lose species like this one, we lose pieces of evolutionary history that can never be replaced.

What You Can Do

While you can’t grow Scotter’s tortula moss in your backyard, you can still be a moss ally:

  • Support habitat conservation in your area
  • Learn about and appreciate common local mosses
  • Participate in citizen science projects that help track rare species
  • Advocate for the protection of natural areas where rare species might survive

Remember, sometimes the best way to love a plant is to admire it from afar and work to protect its wild homes. Scotter’s tortula moss may be small and rare, but it represents something much larger – the incredible diversity of life that shares our planet and deserves our protection.

Scotter’s Tortula Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Pottiales

Family

Pottiaceae Hampe

Genus

Tortula Hedw. - tortula moss

Species

Tortula scotteri R.H. Zander & Steere - Scotter's tortula moss

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