North America Native Plant

Royal Fringedfern

Botanical name: Lomariopsis amydrophlebia

USDA symbol: LOAM2

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Synonyms: Stenochlaena amydrophlebia Slosson ex Maxon (STAM6)   

Royal Fringedfern: A Wetland Treasure from Puerto Rico Meet the royal fringedfern (Lomariopsis amydrophlebia), a fascinating native fern that calls Puerto Rico home. While you might not find this beauty gracing many mainland gardens, it deserves recognition as an important part of Puerto Rico’s unique wetland ecosystems. What Makes Royal ...

Royal Fringedfern: A Wetland Treasure from Puerto Rico

Meet the royal fringedfern (Lomariopsis amydrophlebia), a fascinating native fern that calls Puerto Rico home. While you might not find this beauty gracing many mainland gardens, it deserves recognition as an important part of Puerto Rico’s unique wetland ecosystems.

What Makes Royal Fringedfern Special?

This perennial fern is what botanists call an obligate wetland species, which is a fancy way of saying it almost always lives in wet, soggy places. Think of it as nature’s way of creating a plant perfectly adapted to life in marshes, swamps, and other consistently moist environments.

The royal fringedfern goes by the scientific name Lomariopsis amydrophlebia, and you might occasionally see it referenced under its synonym Stenochlaena amydrophlebia. But let’s be honest – royal fringedfern rolls off the tongue much better!

Where Does It Call Home?

This fern is exclusively native to Puerto Rico, making it a true island endemic. It’s perfectly adapted to the Caribbean climate and wetland conditions found throughout the island.

Is Royal Fringedfern Right for Your Garden?

Here’s where things get a bit tricky. While royal fringedfern is undoubtedly beautiful and ecologically important, it’s not commonly available in the nursery trade, and detailed growing information is limited. If you’re gardening outside of Puerto Rico, this fern probably isn’t the best choice for your landscape.

However, if you’re fortunate enough to be gardening in Puerto Rico and have consistently wet conditions, this native fern could be a wonderful addition to your wetland garden or bog area.

Growing Conditions and Care

Based on its obligate wetland status, royal fringedfern likely requires:

  • Consistently moist to wet soil conditions
  • High humidity levels
  • Protection from direct, harsh sunlight
  • Well-draining but moisture-retentive soil

Like most ferns, it won’t provide nectar for pollinators since ferns reproduce through spores rather than flowers. However, native ferns often serve as important habitat and shelter for various wildlife species.

The Bottom Line

Royal fringedfern represents the unique flora that makes Puerto Rico’s ecosystems so special. While it may not be practical for most gardeners to grow, understanding and appreciating these native species helps us better value the incredible biodiversity of our tropical regions.

If you’re looking for wetland ferns that are more readily available for cultivation, consider exploring other native fern species appropriate for your specific region and growing conditions.

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

OBL

Obligate Wetland - Plants with this status almost always occurs in wetlands

Royal Fringedfern

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

Lomariopsis Fée - fringedfern

Species

Lomariopsis amydrophlebia (Slosson ex Maxon) Holttum - royal fringedfern

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