North America Native Plant

Caroline Tapeinidium

Botanical name: Tapeinidium carolinense

USDA symbol: TACA3

Life cycle: perennial

Habit: forb

Native status: Native to Pacific Basin excluding Hawaii  

Caroline Tapeinidium: A Mysterious Pacific Fern You’ve Probably Never Heard Of If you’re scratching your head wondering what on earth a Caroline tapeinidium is, you’re not alone! Tapeinidium carolinense is one of those botanical mysteries that even seasoned plant enthusiasts rarely encounter. This elusive fern species calls the remote Pacific ...

Caroline Tapeinidium: A Mysterious Pacific Fern You’ve Probably Never Heard Of

If you’re scratching your head wondering what on earth a Caroline tapeinidium is, you’re not alone! Tapeinidium carolinense is one of those botanical mysteries that even seasoned plant enthusiasts rarely encounter. This elusive fern species calls the remote Pacific islands of Guam and Palau home, making it about as exotic as native plants get.

What Exactly Is Caroline Tapeinidium?

Caroline tapeinidium is a perennial fern native to the Pacific Basin, specifically found growing in Guam and Palau. Like other ferns, it reproduces through spores rather than flowers or seeds, and it’s adapted to the unique tropical conditions of these Pacific island environments.

What makes this plant particularly intriguing (and frustrating for plant lovers) is how little we actually know about it. It’s one of those species that exists more in scientific records than in garden centers or landscaping guides.

Where Does It Grow?

This fern is native to a very specific slice of the Pacific Basin, growing naturally only in Guam and Palau. These tropical island locations give us some clues about what conditions it might prefer – think warm, humid, and likely shaded environments typical of tropical island ecosystems.

Is Caroline Tapeinidium Beneficial to Gardens?

Here’s where things get tricky. Because so little is documented about this fern’s growing habits, care requirements, or even its appearance, it’s nearly impossible to say whether it would make a good garden addition. What we can say is:

  • As a fern, it likely prefers shaded, humid conditions
  • Being from tropical islands, it probably can’t handle frost
  • It may have specific soil or moisture requirements we simply don’t know about
  • Its rarity suggests it might be difficult to cultivate

How to Identify Caroline Tapeinidium

Unfortunately, detailed identification characteristics for Caroline tapeinidium aren’t readily available in common field guides or plant databases. This lack of information suggests it’s either extremely rare, possibly extinct, or has been reclassified under a different name.

If you’re exploring the natural areas of Guam or Palau and think you might have spotted this elusive fern, you’d need to consult with local botanists or herbarium specimens for proper identification.

The Bottom Line for Gardeners

While Caroline tapeinidium is certainly an interesting botanical curiosity, it’s not something you’ll be adding to your garden anytime soon. The combination of its extremely limited natural range, lack of cultivation information, and probable rarity means it’s more of a neat to know it exists plant than a practical gardening choice.

If you’re interested in growing Pacific island natives or unusual ferns, you’d be better off looking for more readily available species that are actually cultivated and have known growing requirements. Your local native plant society might be able to suggest some fascinating alternatives that won’t leave you guessing about every aspect of their care!

Caroline Tapeinidium

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Dennstaedtiaceae Lotsy - Bracken Fern family

Genus

Tapeinidium (C. Presl) C. Chr.

Species

Tapeinidium carolinense K.U. Kramer - Caroline tapeinidium

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