North America Native Plant

Maiden Fern

Botanical name: Thelypteris perglandulifera

USDA symbol: THPE9

Life cycle: perennial

Habit: forb

Native status: Native to Pacific Basin excluding Hawaii  

Synonyms: Cyclosorus perglanduliferus (Alderw.) Ching (CYPE)  âš˜  Sphaerostephanos perglanduliferus (Alderw.) Holttum (SPPE11)   

Maiden Fern: A Rare Pacific Island Native Worth Knowing Meet the maiden fern (Thelypteris perglandulifera), a fascinating but little-known fern species that calls the Pacific islands home. While you’re unlikely to find this particular fern at your local nursery, it’s worth understanding what makes this species special—and why it represents ...

Maiden Fern: A Rare Pacific Island Native Worth Knowing

Meet the maiden fern (Thelypteris perglandulifera), a fascinating but little-known fern species that calls the Pacific islands home. While you’re unlikely to find this particular fern at your local nursery, it’s worth understanding what makes this species special—and why it represents the incredible diversity of native plants in our Pacific territories.

What Exactly Is Maiden Fern?

Maiden fern belongs to the Thelypteris genus, a group of ferns known for their delicate, lacy fronds and adaptable nature. This perennial fern is native to the Pacific Basin (excluding Hawaii) and has been documented growing naturally in Guam and Palau. Like its botanical relatives, it likely produces the characteristic feathery foliage that makes ferns such beloved additions to shaded garden spaces.

You might also see this plant referenced by its scientific synonyms: Cyclosorus perglanduliferus or Sphaerostephanos perglanduliferus. These name changes reflect ongoing botanical research and classification updates—something that happens frequently in the fern world!

Where Does It Grow?

This maiden fern has a very limited natural range, found only in Guam and Palau. This restricted distribution makes it a true Pacific island endemic—a plant that evolved in these specific island environments and exists nowhere else on Earth naturally.

Should You Try Growing Maiden Fern?

Here’s where things get tricky. While maiden fern sounds lovely in theory, there’s very little information available about successfully cultivating this particular species. This is often the case with plants that have extremely limited native ranges—they simply haven’t been studied extensively for horticultural purposes.

If you live in Guam or Palau and encounter this fern in the wild, consider yourself lucky to witness a true local native! However, for gardeners elsewhere looking to add ferns to their landscapes, there are many other Thelypteris species and related ferns that are more readily available and better understood in terms of growing requirements.

Better Fern Alternatives for Your Garden

If you’re drawn to the idea of growing native ferns, consider these more accessible alternatives that might be native to your region:

  • New York fern (Thelypteris noveboracensis) – great for North American gardens
  • Marsh fern (Thelypteris palustris) – perfect for wet areas
  • Broad beech fern (Thelypteris hexagonoptera) – excellent for woodland gardens

The Bigger Picture

While you may never grow Thelypteris perglandulifera in your own garden, learning about plants like maiden fern reminds us of the incredible plant diversity that exists in small island ecosystems. These endemic species often face unique conservation challenges due to their limited ranges and small populations.

Supporting native plant conservation efforts and choosing locally native plants for our own gardens helps protect botanical diversity both locally and globally. Every time we plant a native fern, wildflower, or tree, we’re contributing to a larger conservation story.

The Mystery Continues

Maiden fern remains somewhat of a botanical mystery—a reminder that there’s still so much to discover about the plant world. Who knows? Maybe future research will unlock the secrets of successfully growing this Pacific island native, making it available to fern enthusiasts around the world.

Until then, we can appreciate it as one of nature’s more exclusive offerings, quietly thriving in its island paradise and representing the unique botanical heritage of the Pacific region.

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 perglandulifera (Alderw.) C.F. Reed - 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