North America Native Plant

Wilf’s Sphagnum

Botanical name: Sphagnum wilfii

USDA symbol: SPWI

Habit: nonvascular

Native status: Native to North America  

Wilf’s Sphagnum: A Rare Moss Worth Knowing If you’ve ever wandered through a bog or wetland and noticed the spongy, cushiony moss underfoot, you might have encountered a member of the fascinating sphagnum family. Today, let’s dive into one of North America’s more elusive species: Wilf’s sphagnum (Sphagnum wilfii), a ...

Rare plant alert!

Region: Conservation status by state

Status: S2S3: 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) ⚘ 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 ⚘

Wilf’s Sphagnum: A Rare Moss Worth Knowing

If you’ve ever wandered through a bog or wetland and noticed the spongy, cushiony moss underfoot, you might have encountered a member of the fascinating sphagnum family. Today, let’s dive into one of North America’s more elusive species: Wilf’s sphagnum (Sphagnum wilfii), a rare moss that plays a crucial role in our wetland ecosystems.

What Exactly Is Wilf’s Sphagnum?

Wilf’s sphagnum is a bryophyte – that’s the fancy scientific term for the group that includes mosses, liverworts, and hornworts. Like all sphagnum mosses, it’s a small, herbaceous plant that forms those characteristic spongy mats you might step on in boggy areas. Unlike flowering plants, this moss doesn’t have roots in the traditional sense. Instead, it attaches itself to solid surfaces like rocks, logs, or other stable substrates in its wetland home.

What makes Wilf’s sphagnum special is its rarity. This species carries a Global Conservation Status of S2S3, which means it’s considered uncommon to rare and could be vulnerable to extinction. That’s botanist-speak for this little guy needs our attention and protection.

Where Does Wilf’s Sphagnum Call Home?

This moss is native to North America, where it inhabits specialized wetland environments like bogs, fens, and other acidic, waterlogged areas. Its distribution appears to be quite limited, which contributes to its conservation status.

Spotting Wilf’s Sphagnum in the Wild

Identifying specific sphagnum species can be tricky even for experienced botanists, but here are some general characteristics to look for:

  • Small, cushion-like or mat-forming growth pattern
  • Soft, spongy texture that can hold significant amounts of water
  • Pale green to yellowish-green coloration
  • Found in acidic, constantly moist environments
  • Grows attached to stable surfaces rather than directly in soil

Is Wilf’s Sphagnum Beneficial in Gardens?

While Wilf’s sphagnum isn’t something you’d typically cultivate in a home garden, it serves important ecological functions in its natural habitat:

  • Helps create and maintain the acidic conditions that many bog plants require
  • Acts like a natural sponge, helping regulate water levels in wetland ecosystems
  • Provides habitat for small insects and other tiny creatures
  • Contributes to the formation of peat over time

A Word of Caution for Nature Enthusiasts

Here’s the important part: because Wilf’s sphagnum is rare and has a conservation status indicating concern, it’s crucial that we leave it undisturbed in its natural habitat. Resist any temptation to collect this moss for garden projects or terrariums. Instead, appreciate it in place and consider it a special find if you’re lucky enough to encounter it during your wetland explorations.

If you’re interested in incorporating sphagnum moss into garden projects, look for commercially available common sphagnum species that are sustainably harvested, or better yet, consider other native moss alternatives that are more abundant in your region.

Supporting Conservation Efforts

The best way to help Wilf’s sphagnum thrive is to support wetland conservation efforts in your area. These unique ecosystems face threats from development, pollution, and climate change. By protecting the habitats where rare species like Wilf’s sphagnum live, we help ensure that future generations of nature lovers might have the chance to discover this special little moss for themselves.

Remember, sometimes the most valuable plants in our landscapes are the ones we choose to admire rather than cultivate – and Wilf’s sphagnum is definitely one of those treasures worth protecting.

Wilf’s Sphagnum

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Sphagnopsida - Peat mosses

Subclass

Sphagnidae

Order

Sphagnales

Family

Sphagnaceae Dumort.

Genus

Sphagnum L. - sphagnum

Species

Sphagnum wilfii H.A. Crum - Wilf's sphagnum

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