North America Native Plant

Homomallium Moss

Botanical name: Homomallium adnatum

USDA symbol: HOAD

Habit: nonvascular

Native status: Native to North America  

Synonyms: Amblystegiella adnata (Hedw.) Nichols (AMAD)  âš˜  Homomallium adnatum (Hedw.) Broth. var. nelsonii Kindb. ex Gier (HOADN)   

Homomallium Moss: A Tiny Native Groundcover Worth Knowing If you’ve ever wandered through a shady woodland and noticed what looks like a smooth, green carpet hugging rocks and fallen logs, you might have encountered homomallium moss (Homomallium adnatum). This diminutive native moss may not be the showiest plant in your ...

Homomallium Moss: A Tiny Native Groundcover Worth Knowing

If you’ve ever wandered through a shady woodland and noticed what looks like a smooth, green carpet hugging rocks and fallen logs, you might have encountered homomallium moss (Homomallium adnatum). This diminutive native moss may not be the showiest plant in your garden, but it plays an important role in natural ecosystems and can add subtle beauty to the right landscape setting.

What Exactly Is Homomallium Moss?

Homomallium moss is a small, terrestrial moss native to North America. Like all mosses, it’s a non-flowering plant that reproduces through spores rather than seeds. What makes this particular moss interesting is its growth habit – it forms flat, closely appressed mats that seem to flow smoothly over whatever surface it’s growing on, whether that’s a rock, a fallen log, or the base of a tree.

You might also see this moss referred to by its scientific synonyms, including Amblystegiella adnata, though Homomallium adnatum is the currently accepted name.

Where You’ll Find This Native Moss

This moss is native to eastern North America, with confirmed populations in New York and likely other northeastern states. It’s part of our natural heritage and has been quietly doing its job in forest ecosystems for countless years.

How to Identify Homomallium Moss

Identifying homomallium moss takes a keen eye, as many mosses can look quite similar to the casual observer. Here are the key features to look for:

  • Forms flat, smooth mats that closely hug surfaces
  • Leaves are small and closely pressed against the stem
  • Creates a carpet-like appearance rather than standing upright
  • Typically found growing on rocks, logs, or tree bases rather than directly on soil
  • Prefers shaded, moist environments

Is Homomallium Moss Beneficial in Your Garden?

While you probably won’t be rushing out to plant homomallium moss in your flower beds, this little green carpet-maker does offer some benefits to natural and naturalistic gardens:

  • Provides ground cover in challenging spots where other plants struggle
  • Helps prevent soil erosion on slopes and around tree roots
  • Creates habitat for tiny invertebrates and microorganisms
  • Adds natural texture and color to woodland settings
  • Requires no maintenance once established

Encouraging Moss in Your Landscape

Unlike typical garden plants, you can’t really plant homomallium moss in the traditional sense. Instead, if you’d like to encourage native mosses like this one in your landscape, focus on creating the right conditions:

  • Maintain shaded areas with consistent moisture
  • Avoid using herbicides or fertilizers in woodland areas
  • Leave fallen logs and rocks where mosses can naturally colonize
  • Keep foot traffic to a minimum in potential moss areas
  • Be patient – mosses establish slowly but can persist for many years

The Bottom Line on Homomallium Moss

Homomallium moss might not be the star of your garden show, but it’s a fascinating native plant that deserves recognition for its quiet contributions to natural ecosystems. If you’re lucky enough to spot this smooth, carpet-forming moss in your woodland areas or local forests, take a moment to appreciate this small but important piece of our native plant heritage.

Whether you’re creating a naturalistic landscape or simply want to better understand the plants around you, knowing about natives like homomallium moss helps you appreciate the incredible diversity of plant life that calls North America home – even the tiniest, most unassuming species that carpet our forest floors.

Homomallium Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Hypnales

Family

Hypnaceae Schimp.

Genus

Homomallium (Schimp.) Loeske - homomallium moss

Species

Homomallium adnatum (Hedw.) Broth. - homomallium moss

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