North America Native Plant

Arctic Cratoneuron Moss

Botanical name: Cratoneuron arcticum

USDA symbol: CRAR13

Habit: nonvascular

Native status: Native to North America  

Arctic Cratoneuron Moss: A Tiny Arctic Wonder in Your Garden Meet arctic cratoneuron moss (Cratoneuron arcticum), one of nature’s most resilient tiny pioneers! This remarkable bryophyte might be small, but it’s perfectly adapted to some of the harshest conditions on Earth. While most gardeners focus on showy flowers and towering ...

Rare plant alert!

Region: Conservation status by state

Status: S2S4: Status is uncertain but is somewhere between the following rankings: Imperiled: Extremely rare due to factor(s) making it especially vulnerable to extinction. Typically 6 to 20 occurrences or few remaining individuals (1,000 to 3,000) ⚘ Apparently Secure: Uncommon but not rare, and usually widespread. Possibly cause for longterm concern. Typically more than 100 occurrences in the state or more than 10,000 individuals ⚘

Arctic Cratoneuron Moss: A Tiny Arctic Wonder in Your Garden

Meet arctic cratoneuron moss (Cratoneuron arcticum), one of nature’s most resilient tiny pioneers! This remarkable bryophyte might be small, but it’s perfectly adapted to some of the harshest conditions on Earth. While most gardeners focus on showy flowers and towering trees, there’s something wonderfully peaceful about discovering the intricate world of mosses right in your own backyard.

What Exactly Is Arctic Cratoneuron Moss?

Arctic cratoneuron moss is a native North American bryophyte that belongs to the fascinating world of non-flowering plants. Unlike typical garden plants, this moss doesn’t produce flowers, seeds, or even true roots. Instead, it’s a herbaceous plant that forms delicate, feathery mats and prefers to attach itself to rocks, fallen logs, or other solid surfaces rather than growing directly in soil.

This moss has earned its arctic name honestly – it’s naturally found in the cold, northern regions of North America, including Alaska and northern Canada. With a Global Conservation Status of S2S4, it’s considered somewhat uncommon, making any garden appearance a special treat.

Identifying Arctic Cratoneuron Moss

Spotting this moss requires a keen eye since it’s quite small and delicate. Here’s what to look for:

  • Fine, feathery appearance with thread-like stems and leaves
  • Forms dense, low-growing mats
  • Typically grows on rocks, logs, or other hard surfaces
  • Bright to dark green coloration
  • Thrives in consistently moist, shaded areas

Is It Beneficial for Your Garden?

While arctic cratoneuron moss won’t attract butterflies or hummingbirds like flowering plants, it offers unique benefits that make it a valuable garden resident:

  • Soil stabilization: Helps prevent erosion on slopes and around water features
  • Moisture retention: Acts like a natural sponge, helping maintain humidity in its immediate area
  • Microhabitat creation: Provides shelter for tiny insects and other small creatures
  • Year-round interest: Stays green throughout the growing season
  • Low maintenance: Once established, requires virtually no care

Where You Might Find It

If you live in USDA hardiness zones 1-4, you might be lucky enough to discover arctic cratoneuron moss naturally occurring in your landscape. It particularly loves:

  • Shaded rock gardens
  • Areas near water features or consistently moist spots
  • Fallen logs in wooded areas
  • North-facing slopes that stay cool and moist
  • Alpine or naturalistic garden settings

Creating Moss-Friendly Conditions

Rather than trying to cultivate this specialized arctic moss (which can be quite challenging), focus on creating conditions that welcome native mosses in general:

  • Maintain consistent moisture without waterlogging
  • Provide partial to full shade
  • Keep areas free from heavy foot traffic
  • Avoid using fertilizers or chemicals that might disrupt moss growth
  • Consider installing a misting system for dry climates

A Word About Responsible Appreciation

Since arctic cratoneuron moss has a conservation status indicating it’s somewhat uncommon, it’s important to appreciate it responsibly. If you’re fortunate enough to find it growing naturally on your property, resist the urge to transplant or disturb it. Instead, simply enjoy observing this hardy little survivor and the unique character it brings to your landscape.

The Bottom Line

Arctic cratoneuron moss might not be the showstopper of your garden, but it represents something special – a direct connection to the wild, resilient beauty of North America’s northern landscapes. Whether you encounter it naturally or simply learn to recognize it, this tiny moss reminds us that gardens are ecosystems filled with fascinating life at every scale, from the grandest oak tree down to the humblest bryophyte clinging to a garden rock.

Arctic Cratoneuron Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Hypnales

Family

Amblystegiaceae Kindb.

Genus

Cratoneuron (Sull.) Spruce - cratoneuron moss

Species

Cratoneuron arcticum Steere - arctic cratoneuron moss

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