North America Native Plant

Dark Yellow Moosedung Moss

Botanical name: Splachnum luteum var. melanocaulon

USDA symbol: SPLUM

Habit: nonvascular

Native status: Native to North America  

Synonyms: Splachnum melanocaulon (Wahlenb.) Schwägr. (SPME4)   

Dark Yellow Moosedung Moss: A Fascinating but Uncommon Garden Visitor Meet one of nature’s more unusually named plants: the dark yellow moosedung moss (Splachnum luteum var. melanocaulon). Don’t let the quirky name fool you – this tiny moss plays an important role in natural ecosystems, even if it’s not your ...

Rare plant alert!

Region: Conservation status by state

Status: S4?T2?: Status is uncertain but is somewhere between the following rankings: Inexact rank: ⚘ Subspecies or variety is 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 ⚘

Dark Yellow Moosedung Moss: A Fascinating but Uncommon Garden Visitor

Meet one of nature’s more unusually named plants: the dark yellow moosedung moss (Splachnum luteum var. melanocaulon). Don’t let the quirky name fool you – this tiny moss plays an important role in natural ecosystems, even if it’s not your typical garden variety plant.

What Exactly Is Dark Yellow Moosedung Moss?

Dark yellow moosedung moss is a specialized bryophyte – that’s the fancy term for the group of small, non-flowering plants that includes mosses, liverworts, and hornworts. Like all bryophytes, this moss is herbaceous and often attaches itself to solid surfaces rather than growing directly in soil. You might find it clinging to rocks, dead wood, or other stable surfaces in its natural habitat.

This particular moss is native to North America, though its exact geographical distribution isn’t well documented. It’s also known by its synonym Splachnum melanocaulon, if you happen to encounter it in older botanical references.

Should You Be Concerned About Its Rarity?

Here’s something important to know: dark yellow moosedung moss has a Global Conservation Status of S4?T2?, which indicates some level of conservation concern, though the exact definition is unclear. This suggests it may be uncommon or declining in certain areas, so if you’re lucky enough to spot it in your garden or local area, it’s worth appreciating and protecting.

Is It Beneficial in Gardens?

While dark yellow moosedung moss isn’t something you’d typically plant intentionally in your garden, discovering it naturally can actually be a positive sign. Mosses like this one contribute to ecosystem health by:

  • Helping prevent soil erosion
  • Contributing to nutrient cycling in natural areas
  • Providing microscopic habitat for tiny creatures
  • Adding to the biodiversity of your outdoor space

As its common name suggests, this moss has very specific habitat requirements and typically grows on decomposing organic matter. It’s not something you’d cultivate like traditional garden plants, nor would it thrive in typical garden conditions.

How to Identify Dark Yellow Moosedung Moss

Identifying this moss requires a keen eye, as bryophytes can be quite small and similar-looking. Unfortunately, detailed identification characteristics for this specific variety aren’t widely documented in accessible sources. If you suspect you’ve found this moss in your area, consider reaching out to local botanists, university extension services, or bryophyte specialists who can help with proper identification.

The dark and yellow aspects of its common name likely refer to coloration features that distinguish it from other related species, but microscopic examination is often needed for definitive moss identification.

The Bottom Line

Dark yellow moosedung moss is more of a fascinating ecological curiosity than a practical garden addition. If you discover it growing naturally on your property, consider yourself fortunate to host this specialized native species. Rather than trying to cultivate it, the best approach is to protect and preserve any natural occurrences you might find.

For gardeners interested in supporting native plant diversity, focusing on more easily cultivated native flowering plants, shrubs, and trees will have a greater impact on local ecosystems while being much more manageable for home gardeners.

Dark Yellow Moosedung Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Funariales

Family

Splachnaceae Grev. & Arn.

Genus

Splachnum Hedw. - splachnum dung moss

Species

Splachnum luteum Hedw. - yellow moosedung moss

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