North America Native Plant

Papery Tonguefern

Botanical name: Elaphoglossum chartaceum

USDA symbol: ELCH2

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Papery Tonguefern: A Rare Caribbean Native Worth Knowing Meet the papery tonguefern (Elaphoglossum chartaceum), one of Puerto Rico’s lesser-known botanical treasures. This perennial fern belongs to the fascinating world of tongue ferns, a group known for their distinctive simple fronds that look remarkably like, well, tongues! While you won’t find ...

Papery Tonguefern: A Rare Caribbean Native Worth Knowing

Meet the papery tonguefern (Elaphoglossum chartaceum), one of Puerto Rico’s lesser-known botanical treasures. This perennial fern belongs to the fascinating world of tongue ferns, a group known for their distinctive simple fronds that look remarkably like, well, tongues! While you won’t find this particular species at your local garden center, it’s worth understanding what makes this Caribbean native special.

Where Does Papery Tonguefern Call Home?

The papery tonguefern is native to Puerto Rico, where it thrives in the island’s lush tropical environment. This fern has adapted perfectly to the humid, warm conditions of the Caribbean, making it a true child of the tropics.

What Makes This Fern Special?

Like other members of the Elaphoglossum genus, the papery tonguefern produces simple, undivided fronds that give it its tongue appearance. The species name chartaceum refers to its papery texture – imagine delicate, green parchment unfurling in the forest understory. As a perennial, this fern comes back year after year, slowly building small colonies in its preferred growing spots.

Garden Benefits and Ecological Role

While specific information about this fern’s wildlife benefits is limited, ferns in general provide important ecological services:

  • Create humid microclimates that benefit other plants and small animals
  • Provide shelter for insects and small creatures
  • Help prevent soil erosion with their root systems
  • Add textural interest and natural beauty to shaded areas

Should You Try Growing Papery Tonguefern?

Here’s where things get a bit tricky. The papery tonguefern appears to be quite rare, with limited information available about its cultivation and conservation status. If you’re lucky enough to encounter this species, it would likely thrive in USDA hardiness zones 10-12, requiring:

  • High humidity and warm temperatures year-round
  • Filtered light or deep shade
  • Well-draining but consistently moist growing medium
  • Protection from direct sunlight and strong winds

Important note: Due to its apparent rarity and limited availability, we strongly recommend only obtaining this fern through responsible sources if you’re considering cultivation. Never collect plants from the wild, and always verify that any plant material has been legally and ethically sourced.

Alternative Ferns for Your Garden

If you’re fascinated by tongue ferns but can’t source the papery tonguefern responsibly, consider these more readily available alternatives that might work in similar growing conditions:

  • Other Elaphoglossum species that are commercially available
  • Native ferns from your local area that prefer similar shaded, humid conditions
  • Tropical ferns suited to your growing zone that can provide similar aesthetic appeal

The Bottom Line

The papery tonguefern represents the incredible diversity of Puerto Rico’s native flora. While it may not be practical for most gardeners to grow, understanding and appreciating plants like this helps us value the importance of protecting native habitats. If you’re passionate about rare ferns and have the right growing conditions, seek out reputable sources and consider supporting conservation efforts for Puerto Rico’s unique plant communities.

Sometimes the most important plants are the ones that teach us to look more carefully at the natural world around us – and the papery tonguefern certainly fits that bill!

Papery Tonguefern

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Dryopteridaceae Herter - Wood Fern family

Genus

Elaphoglossum Schott ex J. Sm. - tonguefern

Species

Elaphoglossum chartaceum (Baker ex Jenman) C. Chr. - papery tonguefern

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