Native Plants

Clubmoss

Huperzia ×gillettii

USDA symbol: HUGI

perennial subshrub

Hawaii: native

If you’ve ever wondered about those peculiar, primitive-looking plants that seem stuck somewhere between moss and fern, you’ve probably encountered a clubmoss! Today, we’re diving into the fascinating world of Huperzia ×gillettii, a unique hybrid clubmoss that calls the beautiful Hawaiian islands home. Despite its common name clubmoss, this plant ...

Meet Huperzia ×gillettii: Hawaii’s Mysterious Hybrid Clubmoss

If you’ve ever wondered about those peculiar, primitive-looking plants that seem stuck somewhere between moss and fern, you’ve probably encountered a clubmoss! Today, we’re diving into the fascinating world of Huperzia ×gillettii, a unique hybrid clubmoss that calls the beautiful Hawaiian islands home.

What Exactly Is a Clubmoss?

Despite its common name clubmoss, this plant isn’t actually a moss at all! Clubmosses belong to an ancient group of plants called lycopods, which have been around for about 400 million years. Think of them as living fossils that give us a glimpse into what Earth’s plant life looked like long before dinosaurs roamed the planet.

Huperzia ×gillettii is classified as a forb herb, meaning it’s a vascular plant without significant woody tissue above or at ground level. The × symbol in its name is a dead giveaway that this is a hybrid species, born from the crossing of two different Huperzia species.

Where You’ll Find This Hawaiian Native

This perennial clubmoss is exclusively native to Hawaii, making it a true island endemic. You won’t find Huperzia ×gillettii growing wild anywhere else in the world – it’s as uniquely Hawaiian as hula dancing and poke bowls!

  • Species observed
  • No observations

Spotting Huperzia ×gillettii in the Wild

Since this is a hybrid species, detailed information about its specific appearance can be quite limited. However, like other members of the Huperzia genus, it likely shares some common characteristics:

  • Small, needle-like leaves arranged in a spiral pattern
  • Upright or hanging growth habit
  • Reproduces through spores rather than seeds or flowers
  • Primitive, ancient appearance that sets it apart from typical garden plants

Is It Beneficial for Your Garden?

Here’s where things get interesting! As a facultative wetland species, Huperzia ×gillettii can grow in both wetland and non-wetland conditions, making it quite adaptable. However, being a rare hybrid endemic to Hawaii, this isn’t a plant you’re likely to encounter at your local garden center.

While clubmosses don’t offer the flashy flowers that attract pollinators (they reproduce through spores, after all), they do provide:

  • Unique textural interest with their primitive, ancient appearance
  • Educational value as living examples of early plant evolution
  • Conversation starters for garden visitors curious about unusual plants

The Conservation Angle

As a hybrid species native only to Hawaii, Huperzia ×gillettii represents a unique piece of the islands’ botanical heritage. While we don’t have specific information about its rarity status, hybrid plants are often less common than their parent species, making them particularly special when encountered in their natural habitat.

What This Means for Gardeners

Unless you’re gardening in Hawaii and happen upon this species in the wild, you’re unlikely to cultivate Huperzia ×gillettii in your home garden. But that doesn’t mean you can’t appreciate clubmosses! Many other Huperzia species and related lycopods are available through specialty nurseries and can add that same prehistoric charm to your landscape.

If you’re fascinated by ancient plants and want to add some evolutionary history to your garden, consider looking for other members of the clubmoss family that are more readily available and suited to your local growing conditions.

The Bottom Line

Huperzia ×gillettii may be a bit of a botanical mystery, but it represents something truly special – a living link to Earth’s ancient past, thriving in one of the world’s most isolated island chains. While you might not be planting it in your backyard anytime soon, knowing about this unique hybrid helps us appreciate the incredible diversity of plant life that exists in specialized habitats around the world.

Next time you’re in Hawaii, keep an eye out for unusual, primitive-looking plants. You just might be looking at one of evolution’s most enduring success stories!

Wetland Status

The rule of seasoned gardeners and landscapers is to choose the "right plant for the right place" — matching plants to their ideal growing conditions, so they'll thrive with less care and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection can be if you don't have the right information. While tags on nursery plants list watering requirements, there's more to the story.

Knowing a plant's wetland status can simplify the process by revealing the interaction between plants, water, and soil. You might be surprised to learn that popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. The table below gives insight into the preferred growing conditions of this plant throughout its geographical distribution.

Region
Preferred Habitat

Hawaii ()

Facultative
Wetland Glossary
Obligate Wetland
Facultative Wetland
Facultative
Facultative Upland
Obligate Upland
Almost always occurs in wetlands
Usually occurs in wetlands but may occur in non-wetlands
Can occur in wetlands and non-wetlands
Usually occurs in non-wetlands but may occur in wetlands
Almost never occurs in wetlands

Classification

Group: Lycopod
Kingdom: Plantae - Plants
Subkingdom: Tracheobionta - Vascular plants
Division: Lycopodiophyta - Lycopods
Class: Lycopodiopsida
Order: Lycopodiales
Family: Lycopodiaceae P. Beauv. ex Mirb. - Club-moss family
Genus: Huperzia Bernh. - clubmoss

Species: Huperzia ×gillettii Beitel & W.H. Wagner [serrata × subintegra] - clubmoss

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