North America Native Plant

Blandow’s Helodium Moss

Botanical name: Helodium blandowii var. helodioides

USDA symbol: HEBLH

Habit: nonvascular

Native status: Native to North America  

Synonyms: Helodium paludosum (Sull.) Austin var. helodioides (Renauld & Cardot) Grout (HEPAH)   

Blandow’s Helodium Moss: A Wetland Wonder Worth Knowing Meet Blandow’s helodium moss (Helodium blandowii var. helodioides), a fascinating little bryophyte that’s quietly doing important work in North America’s wetland ecosystems. While you might not be planning to cultivate this particular moss in your backyard, understanding what it is and recognizing ...

Rare plant alert!

Region: Conservation status by state

Status: S5T3: Status is uncertain but is somewhere between the following rankings: Subspecies or variety is 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. ⚘ Secure: At very low or no risk of extinction in the jurisdiction due to a very extensive range, abundant populations or occurrences, with little to no concern from declines or threats. ⚘

Blandow’s Helodium Moss: A Wetland Wonder Worth Knowing

Meet Blandow’s helodium moss (Helodium blandowii var. helodioides), a fascinating little bryophyte that’s quietly doing important work in North America’s wetland ecosystems. While you might not be planning to cultivate this particular moss in your backyard, understanding what it is and recognizing its ecological value can deepen your appreciation for the complex web of native plants that make our landscapes thrive.

What Exactly Is Blandow’s Helodium Moss?

This moss belongs to the diverse world of bryophytes – those ancient, resilient plants that include mosses, liverworts, and hornworts. Unlike the flowering plants we typically think of for gardens, Blandow’s helodium moss is entirely herbaceous and has a unique way of making itself at home. Rather than simply growing in soil, it often attaches itself to solid surfaces like rocks, logs, or other stable structures in its environment.

You might also encounter this species listed under its scientific synonym, Helodium paludosum var. helodioides, in older botanical references.

Where Does It Call Home?

As a North American native, this moss has carved out its niche in the continent’s diverse ecosystems. While specific distribution details for this particular variety are limited, it’s part of the broader Helodium family that typically favors moist, often boggy environments across northern regions.

Is It Beneficial for Gardens?

While Blandow’s helodium moss isn’t something you’d typically plant intentionally in a traditional garden setting, mosses like this one provide several ecosystem benefits:

  • They help prevent soil erosion in wet areas
  • They contribute to the overall biodiversity of native plant communities
  • They can indicate healthy, undisturbed wetland ecosystems
  • They provide microhabitats for tiny organisms that form the base of food webs

A Note About Conservation

This moss carries a Global Conservation Status of S5T3, which suggests it may have some conservation considerations. If you’re lucky enough to spot this species in the wild, it’s worth appreciating it where it grows naturally rather than attempting to transplant it. Native moss communities are complex and often difficult to recreate outside their natural habitats.

How to Identify It

Identifying specific moss varieties can be challenging even for experienced botanists, as many species look quite similar to the untrained eye. Blandow’s helodium moss, like its bryophyte relatives, will appear as low-growing, green vegetation that forms mats or cushions. In its preferred wetland habitats, you might notice it growing on fallen logs, rocks, or other stable surfaces near water.

For definitive identification, you’d typically need to examine microscopic features – a job best left to botanists or experienced naturalists with proper equipment.

The Bigger Picture

While you probably won’t be adding Blandow’s helodium moss to your shopping list for weekend garden projects, recognizing and appreciating native species like this one helps us understand the incredible diversity of plant life that supports healthy ecosystems. Next time you’re exploring wetland areas, take a moment to notice the often-overlooked bryophytes quietly contributing to these complex natural communities.

These humble mosses remind us that not every valuable plant needs to be showy or garden-ready to play an important role in the natural world.

Blandow’s Helodium Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Hypnales

Family

Helodiaceae Ochyra

Genus

Helodium Warnst. - helodium moss

Species

Helodium blandowii (F. Weber & D. Mohr) Warnst. - Blandow's helodium moss

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