North America Native Plant

Maiden Fern

Botanical name: Thelypteris ×rolandii

USDA symbol: THRO2

Life cycle: perennial

Habit: forb

Native status: Native to Puerto Rico  

Synonyms: Dryopteris rolandii C. Chr. (DRRO4)   

Discovering the Maiden Fern: Puerto Rico’s Native Thelypteris ×rolandii Meet the maiden fern, a fascinating native species that calls Puerto Rico home. Known scientifically as Thelypteris ×rolandii, this perennial fern represents one of nature’s interesting botanical puzzles – a hybrid species that showcases the diversity of fern life in tropical ...

Discovering the Maiden Fern: Puerto Rico’s Native Thelypteris ×rolandii

Meet the maiden fern, a fascinating native species that calls Puerto Rico home. Known scientifically as Thelypteris ×rolandii, this perennial fern represents one of nature’s interesting botanical puzzles – a hybrid species that showcases the diversity of fern life in tropical environments.

What Makes This Fern Special?

The maiden fern belongs to the Thelypteris genus, a group of ferns known for their delicate fronds and adaptable nature. What’s particularly intriguing about this species is the × symbol in its scientific name, which indicates it’s a natural hybrid – essentially nature’s own botanical experiment. You might also see it referred to by its synonym, Dryopteris rolandii, in older botanical references.

Where You’ll Find It

This maiden fern is endemic to Puerto Rico, meaning it evolved there and exists nowhere else naturally in the world. As a true island native, it’s perfectly adapted to the unique conditions of Puerto Rican ecosystems.

Is It Beneficial for Gardens?

While detailed horticultural information about this specific hybrid is limited, ferns in general offer several garden benefits:

  • They add lush, tropical texture to shaded areas
  • Most ferns are low-maintenance once established
  • They can help create naturalistic woodland settings
  • Ferns generally don’t have invasive tendencies

However, since this is a Puerto Rico endemic species, it would likely only thrive in similar tropical or subtropical climates, making it unsuitable for most mainland gardens.

Identifying the Maiden Fern

As with many hybrid ferns, specific identification can be challenging without botanical expertise. If you’re exploring Puerto Rico’s natural areas and think you’ve spotted this species, look for the characteristic features of the Thelypteris group, though definitive identification would require expert confirmation.

A Word About Conservation

Since detailed information about this fern’s population status isn’t readily available, it’s always wise to appreciate native plants in their natural habitat rather than attempting to collect them. Puerto Rico’s native flora faces various pressures, and endemic species like the maiden fern deserve our respect and protection.

The Bottom Line

The maiden fern represents the rich botanical heritage of Puerto Rico’s native flora. While it may not be the fern for your backyard garden (unless you happen to live in a similar tropical climate), it serves as a reminder of the incredible diversity found in island ecosystems. For most gardeners, exploring local native fern species would be a more practical and ecologically sound choice for adding these graceful plants to their landscapes.

Maiden Fern

Classification

Group

Fern

Kingdom

Plantae - Plants

Subkingdom

Tracheobionta - Vascular plants

Superdivision
Division

Pteridophyta - Ferns

Subdivision
Class

Filicopsida

Subclass
Order

Polypodiales

Family

Thelypteridaceae Ching ex Pic. Serm. - Marsh Fern family

Genus

Thelypteris Schmidel - maiden fern

Species

Thelypteris ×rolandii (C. Chr.) R. Tryon [poiteana × tetragona] - maiden fern

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