North America Native Plant

Puerto Rico Danafern

Botanical name: Danaea jenmanii

USDA symbol: DAJE

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Puerto Rico Danafern: A Mysterious Native Fern Worth Knowing Meet the Puerto Rico danafern (Danaea jenmanii), a native fern species that’s as intriguing as it is elusive. If you’re drawn to unique native plants and have a soft spot for ferns, this Caribbean native might just capture your imagination—though finding ...

Puerto Rico Danafern: A Mysterious Native Fern Worth Knowing

Meet the Puerto Rico danafern (Danaea jenmanii), a native fern species that’s as intriguing as it is elusive. If you’re drawn to unique native plants and have a soft spot for ferns, this Caribbean native might just capture your imagination—though finding one might prove to be quite the adventure!

What Exactly Is the Puerto Rico Danafern?

Despite some conflicting information you might encounter, Danaea jenmanii is indeed a fern, not a flowering plant. This perennial species belongs to the Danaea genus, a group of tropical ferns that have been quietly thriving in their native habitats for countless years. The Puerto Rico danafern is, as its name suggests, native to Puerto Rico, where it has adapted to the island’s unique growing conditions.

Where Does It Call Home?

This fascinating fern is endemic to Puerto Rico, meaning it naturally occurs nowhere else in the world. Within its island home, it shows a preference for wetland environments, though it can occasionally be found in non-wetland areas as well. This flexibility in habitat preference suggests it’s somewhat adaptable, which is always a plus for any native plant.

The Challenge of Growing Puerto Rico Danafern

Here’s where things get a bit tricky—and honestly, quite mysterious. Information about successfully cultivating Danaea jenmanii is remarkably scarce. This could mean several things:

  • It might be a rare species with very specific growing requirements
  • It could be difficult to propagate or establish in cultivation
  • It may simply be understudied and underutilized in horticulture

What we do know is that it tends to favor wetland conditions, so if you’re determined to try growing this fern, providing consistent moisture would likely be essential.

Why Consider This Native Fern?

While we can’t provide a detailed growing guide due to limited information, there are compelling reasons why native plant enthusiasts might be interested in the Puerto Rico danafern:

  • Conservation value: Growing native species helps preserve local biodiversity
  • Unique character: As an endemic species, it offers something truly special for collectors of rare plants
  • Low maintenance potential: Native plants are typically well-adapted to local conditions
  • Wetland gardening: Perfect for rain gardens or naturally moist areas of your landscape

A Word of Caution

Given the limited information available about this species, it’s possible that Danaea jenmanii is rare or has specific conservation concerns. If you’re interested in adding this fern to your collection, please ensure you’re sourcing it responsibly from reputable native plant nurseries rather than collecting from wild populations.

The Bottom Line

The Puerto Rico danafern represents one of those intriguing native species that reminds us how much we still have to learn about our local flora. While it may not be the easiest fern to find or grow, its status as a Puerto Rican endemic makes it a fascinating addition to any native plant enthusiast’s wishlist.

If you’re passionate about wetland plants or simply love the idea of growing something truly unique to your region, keep an eye out for this mysterious fern. And if you do manage to grow one successfully, consider sharing your experience with fellow native plant gardeners—you might just be pioneering the cultivation of this understudied species!

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 work and fewer inputs. But the simplicity of this catchphrase conceals how tricky plant selection is. While tags 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. Surprisingly, many popular landscape plants are wetland species! And what may be a wetland plant in one area, in another it might thrive in drier conditions. Also, it helps you make smarter gardening choices and grow healthy plants with less care and feeding, saving you time, frustration, and money while producing an attractive garden with greater ecological benefits.

Regions
Status
Moisture Conditions

Caribbean

FACW

Facultative Wetland - Plants with this status usually occurs in wetlands but may occur in non-wetlands

Puerto Rico Danafern

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Marattiales

Family

Marattiaceae Kaulf. - Vessel Fern family

Genus

Danaea Sm. - danafern

Species

Danaea jenmanii Underw. - Puerto Rico danafern

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