North America Native Plant

Carlott’s Wijkia Moss

Botanical name: Wijkia carlottae

USDA symbol: WICA4

Habit: nonvascular

Native status: Native to North America  

Synonyms: Acanthocladium carlottae Schof. (ACCA22)   

Carlott’s Wijkia Moss: A Rare Native Bryophyte Worth Knowing If you’ve ever wondered about the tiny green carpets that sometimes appear in your garden, you might have encountered a moss! Today, we’re diving into the fascinating world of Carlott’s wijkia moss (Wijkia carlottae), a native North American species that’s as ...

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 ⚘

Carlott’s Wijkia Moss: A Rare Native Bryophyte Worth Knowing

If you’ve ever wondered about the tiny green carpets that sometimes appear in your garden, you might have encountered a moss! Today, we’re diving into the fascinating world of Carlott’s wijkia moss (Wijkia carlottae), a native North American species that’s as rare as it is intriguing.

What Exactly Is Carlott’s Wijkia Moss?

Carlott’s wijkia moss belongs to the bryophyte family – that’s the scientific way of saying it’s a non-flowering plant that includes mosses, liverworts, and hornworts. Unlike the flowering plants we typically think of when gardening, this little green wonder doesn’t produce seeds or flowers. Instead, it reproduces through spores, making it quite the botanical rebel!

This terrestrial moss is always herbaceous and has a particular fondness for attaching itself to solid surfaces like rocks, tree bark, or even dead wood rather than growing directly in soil. Think of it as nature’s way of decorating the harder surfaces in our landscape.

A Rare Native Treasure

Here’s where things get particularly interesting – Carlott’s wijkia moss is native to North America, but it’s not exactly common. With a Global Conservation Status of S2S3, this moss falls into a category that suggests it’s quite rare and potentially vulnerable. This rarity makes any sighting of this moss pretty special!

While we don’t have detailed information about its exact geographical distribution, knowing it’s a North American native means it has evolved alongside our local ecosystems for thousands of years.

Is This Moss Beneficial for Your Garden?

Even though we can’t provide specific cultivation advice for this rare moss, bryophytes in general can be wonderful additions to natural garden settings. Here’s why:

  • They help prevent soil erosion by creating protective ground cover
  • Mosses can indicate healthy, stable growing conditions in your garden
  • They add texture and visual interest to rock gardens and shaded areas
  • Bryophytes contribute to the overall biodiversity of your landscape

How to Identify Carlott’s Wijkia Moss

Identifying this particular moss species can be tricky, especially given its rarity. As with most bryophyte identification, you’ll want to look for:

  • Small, herbaceous growth attached to rocks, bark, or wood surfaces
  • Typical moss-like appearance with tiny leaf-like structures
  • Growth in terrestrial (land-based) environments rather than aquatic settings

However, positive identification of Carlott’s wijkia moss really requires expert knowledge and possibly microscopic examination, as many moss species look quite similar to the untrained eye.

A Word About Conservation

If you’re lucky enough to spot what you think might be Carlott’s wijkia moss in your garden or local area, consider yourself fortunate! Given its rarity status, this moss deserves our respect and protection. Rather than attempting to transplant or disturb it, simply appreciate it where it grows naturally.

The best thing we can do for rare native species like this one is to maintain healthy, diverse garden ecosystems that support all kinds of plant life – from the showiest flowering perennials to the humblest mosses quietly doing their part in the background.

The Bottom Line

While Carlott’s wijkia moss might not be the star of your garden design, it represents the incredible diversity of native plants that call North America home. These small but mighty bryophytes remind us that every plant, no matter how tiny or unassuming, has a role to play in our natural world.

So next time you’re wandering through your garden, take a moment to appreciate the mosses you encounter – you might just be looking at one of nature’s rare gems!

Carlott’s Wijkia Moss

Classification

Group

Moss

Kingdom

Plantae - Plants

Subkingdom
Superdivision
Division

Bryophyta - Mosses

Subdivision

Musci

Class

Bryopsida - True mosses

Subclass

Bryidae

Order

Hypnales

Family

Sematophyllaceae Broth.

Genus

Wijkia H.A. Crum - wijkia moss

Species

Wijkia carlottae (Schof.) H.A. Crum - Carlott's wijkia moss

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