North America Native Plant

Clubmoss

Botanical name: Lycopodium ×issleri

USDA symbol: LYIS

Life cycle: perennial

Habit: subshrub

Native status: Native to the lower 48 states  

Synonyms: Diphasiastrum ×issleri (Rouy) Holub (DIIS3)  âš˜  Diphasium issleri (Rouy) Holub (DIIS4)  âš˜  Lycopodium alpinum L. var. decipiens Syme ex Druce (LYALD)  âš˜  Lycopodium alpinum L. ssp. issleri (Rouy) Chassagne (LYALI)  âš˜  Lycopodium complanatum L. ssp. issleri (Rouy) Domin (LYCOI)  âš˜  Lycopodium complanatum L. var. pseudoalpinum Farw. (LYCOP7)   

Discovering the Mysterious Clubmoss: A Rare Native Lycopod If you’ve ever wondered about those ancient-looking, moss-like plants that seem to belong in a prehistoric forest, you might be looking at a clubmoss! Today, we’re exploring one of nature’s more elusive characters: Lycopodium ×issleri, a fascinating native clubmoss that’s as mysterious ...

Discovering the Mysterious Clubmoss: A Rare Native Lycopod

If you’ve ever wondered about those ancient-looking, moss-like plants that seem to belong in a prehistoric forest, you might be looking at a clubmoss! Today, we’re exploring one of nature’s more elusive characters: Lycopodium ×issleri, a fascinating native clubmoss that’s as mysterious as it is rare.

What Exactly Is This Clubmoss?

Despite its common name clubmoss, this little green wonder isn’t actually a moss at all! Clubmosses are lycopods – ancient vascular plants that have been around since before dinosaurs walked the Earth. Think of them as living fossils that decided to stick around and see what all the fuss was about.

Lycopodium ×issleri is what botanists call a hybrid species (that little × symbol is the giveaway). It’s a perennial plant that grows as a forb herb, meaning it’s a non-woody vascular plant that keeps its growing points at or below ground level. Pretty clever survival strategy if you ask me!

Where Can You Find This Elusive Plant?

This native clubmoss calls the lower 48 states home, though it’s currently documented primarily in Maine. Like many of its lycopod relatives, it seems to prefer keeping a low profile and isn’t exactly broadcasting its whereabouts.

Is It Beneficial to Have in Your Garden?

Here’s where things get interesting – and a bit tricky. While clubmosses can add a unique, primordial charm to naturalized gardens and woodland settings, Lycopodium ×issleri is quite the enigma. There’s limited information available about its specific benefits, growing requirements, or even its exact appearance.

What we do know is that lycopods in general:

  • Add an ancient, mystical quality to woodland gardens
  • Thrive in specialized conditions that many other plants can’t handle
  • Represent an important part of our botanical heritage
  • Can be conversation starters for plant enthusiasts

How to Identify This Mysterious Clubmoss

Since specific identification details for Lycopodium ×issleri are scarce, you’ll want to look for general clubmoss characteristics:

  • Small, scale-like leaves arranged in spirals or opposite patterns
  • Branching stems that often fork or divide
  • A generally moss-like appearance but with a more structured, vascular plant look
  • Spore-producing structures (sporangia) that may appear as small clubs or cones

However, because this is a hybrid species with limited documentation, positive identification would likely require expert botanical knowledge.

Should You Try to Grow It?

Here’s the honest truth: growing Lycopodium ×issleri might be more challenging than finding a unicorn in your backyard. With unknown growing conditions, propagation methods, and limited availability, this isn’t exactly a beginner-friendly plant.

If you’re interested in adding clubmosses to your garden, consider starting with more well-documented native species that are better understood and more readily available. Many other native lycopods can provide similar aesthetic appeal while being more cooperative garden companions.

The Bottom Line

Lycopodium ×issleri represents one of nature’s more secretive characters – a native hybrid clubmoss that keeps its cards close to its chest. While it’s undoubtedly a fascinating piece of our botanical heritage, its mysterious nature makes it more suitable for botanical curiosity than practical gardening.

If you suspect you’ve encountered this rare hybrid in the wild, consider yourself lucky to witness a living piece of ancient plant history. Just remember to look, appreciate, and leave it undisturbed for future generations of plant enthusiasts to discover and wonder about.

Clubmoss

Classification

Group

Lycopod

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Lycopodiophyta - Lycopods

Subdivision
Class

Lycopodiopsida

Subclass
Order

Lycopodiales

Family

Lycopodiaceae P. Beauv. ex Mirb. - Club-moss family

Genus

Lycopodium L. - clubmoss

Species

Lycopodium ×issleri (Rouy) Domin [alpinum × complanatum] - clubmoss

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