North America Native Plant

Tryon’s Woodsia

Botanical name: Woodsia ×tryonis

USDA symbol: WOTR

Life cycle: perennial

Habit: forb

Native status: Native to Canada  

Tryon’s Woodsia: A Rare Canadian Fern Mystery Meet Tryon’s woodsia (Woodsia ×tryonis), one of Canada’s most elusive ferns. If you’ve never heard of this plant before, you’re not alone – this mysterious hybrid fern is so rare that it exists more in botanical theory than in most gardens. What Makes ...

Tryon’s Woodsia: A Rare Canadian Fern Mystery

Meet Tryon’s woodsia (Woodsia ×tryonis), one of Canada’s most elusive ferns. If you’ve never heard of this plant before, you’re not alone – this mysterious hybrid fern is so rare that it exists more in botanical theory than in most gardens.

What Makes This Fern Special?

Tryon’s woodsia is what botanists call a hybrid fern, indicated by that little × symbol in its scientific name. This perennial fern belongs to the Woodsia genus, a group known for their delicate, lacy fronds and ability to thrive in rocky conditions. Unlike the flashy flowering plants that dominate most garden conversations, this modest fern represents something quite extraordinary in the plant world.

Where in the World?

This Canadian native calls Ontario home, making it a true northern treasure. Its extremely limited geographical distribution adds to its mystique – you won’t stumble across Tryon’s woodsia on a casual nature walk.

The Rarity Factor

Here’s where things get interesting (and a bit disappointing for eager gardeners): Tryon’s woodsia is incredibly rare. So rare, in fact, that finding reliable growing information or commercially available plants is nearly impossible. This isn’t a fern you’ll find at your local nursery or even specialty plant shops.

Should You Try to Grow It?

While the idea of growing such a rare Canadian native might be appealing, the reality is quite different:

  • Extremely limited availability makes sourcing nearly impossible
  • Specialized growing requirements that aren’t well-documented
  • Conservation concerns due to its rarity
  • Better alternatives exist for home gardeners

Better Alternatives for Your Garden

If you’re drawn to the idea of growing native Canadian ferns, consider these more readily available Woodsia relatives:

  • Rusty woodsia (Woodsia ilvensis) – more common and easier to grow
  • Smooth woodsia (Woodsia glabella) – another hardy native option
  • Fragile fern (Cystopteris fragilis) – delicate beauty for rock gardens

The Botanical Significance

While Tryon’s woodsia might not be destined for your garden, it represents an important piece of Canada’s botanical heritage. Hybrid ferns like this one help scientists understand plant evolution and adaptation. Sometimes the most valuable plants are the ones we admire from afar while protecting their wild populations.

What This Means for Gardeners

Rather than pursuing this botanical unicorn, channel your enthusiasm for native plants into species that are both available and ecologically beneficial. Ontario has plenty of wonderful native ferns and other plants that will thrive in home gardens while supporting local ecosystems.

The story of Tryon’s woodsia reminds us that not every plant is meant for cultivation – sometimes the best way to appreciate a species is to ensure its continued existence in the wild. For your garden, stick with the many beautiful and available native alternatives that will give you the satisfaction of growing something truly special without the conservation concerns.

Tryon’s Woodsia

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

Woodsia R. Br. - cliff fern

Species

Woodsia ×tryonis B. Boivin [glabella × ilvensis] - Tryon's woodsia

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