North America Non-native Plant

Heartleaf Maiden Fern

Botanical name: Thelypteris cordata var. cordata

USDA symbol: THCOC3

Native status: Not native but doesn't reproduce and persist in the wild

Synonyms: Dryopteris cordata (Fée) Urb. (DRCO8)   

Heartleaf Maiden Fern: A Mysterious Native Fern Worth Investigating If you’re a fern enthusiast always on the hunt for something unique, you might have stumbled across the intriguing name heartleaf maiden fern (Thelypteris cordata var. cordata). But here’s the thing – this particular fern is something of a botanical mystery ...

Heartleaf Maiden Fern: A Mysterious Native Fern Worth Investigating

If you’re a fern enthusiast always on the hunt for something unique, you might have stumbled across the intriguing name heartleaf maiden fern (Thelypteris cordata var. cordata). But here’s the thing – this particular fern is something of a botanical mystery that even the experts are still trying to fully understand.

What We Know About Heartleaf Maiden Fern

The heartleaf maiden fern belongs to the Thelypteris genus, a group of ferns commonly known as maiden ferns or wood ferns. The scientific name Thelypteris cordata var. cordata suggests this is a specific variety of T. cordata, with cordata referring to its heart-shaped characteristics – likely the shape of its leaflets or fronds.

This fern has also been classified under the synonym Dryopteris cordata, showing how botanical classifications can shift as our understanding of plant relationships evolves.

The Challenge: Limited Information

Here’s where things get interesting (and a bit frustrating for us plant lovers): reliable, specific information about Thelypteris cordata var. cordata is surprisingly scarce. Unlike many well-documented native plants, this particular variety seems to exist in something of an informational void.

We don’t currently have clear data about:

  • Its exact native range and distribution
  • Specific growing requirements and conditions
  • USDA hardiness zones
  • Typical size and growth habits
  • Availability in the nursery trade

What This Means for Gardeners

If you’re considering adding this fern to your garden, you might want to pump the brakes a bit. The lack of readily available cultivation information makes it difficult to provide reliable growing advice. This could mean a few things:

  • The variety might be extremely rare or have a very limited natural range
  • It could be a recent taxonomic designation that hasn’t been widely studied
  • There might be some confusion in plant databases and identification

Better-Known Alternatives

While we sort out the mystery of T. cordata var. cordata, consider these well-documented native alternatives that might scratch your maiden fern itch:

  • New York Fern (Thelypteris noveboracensis) – A reliable native with tapering fronds
  • Marsh Fern (Thelypteris palustris) – Perfect for wet areas and well-documented
  • Broad Beech Fern (Phegopteris hexagonoptera) – Another heart-shaped option that’s easier to find

The Bottom Line

The heartleaf maiden fern represents one of those fascinating botanical puzzles that remind us how much we still have to learn about our native plants. Until more information becomes available about its specific needs and characteristics, it’s probably best to stick with better-documented fern species for your garden projects.

If you’re a botanical detective at heart, keep an eye on future research – this mysterious fern might just surprise us all when someone finally unlocks its secrets!

Heartleaf 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 cordata (Fée) Proctor - heartleaf 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