Lygodium palmatum

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American climbing fern
Lygodium palmatum.jpg

Apparently Secure (NatureServe)[1]
Scientific classification edit
Kingdom: Plantae
Clade: Tracheophytes
Division: Polypodiophyta
Class: Polypodiopsida
Order: Schizaeales
Family: Lygodiaceae
Genus: Lygodium
L. palmatum
Binomial name
Lygodium palmatum

Lygodium palmatum is the only species of its genus native to North America. Unlike most species in the genus, this one, called the American climbing fern[2] (or Hartford fern, after Hartford, Connecticut), is extremely hardy in temperate zones.

This fern is on endangered or threatened species lists in several states. It requires constant moisture, high light levels, and intensely acid soil to thrive. Its range is essentially Appalachian, ranging from New England down through the Appalachians, Piedmont and Appalachian plateaus into the American south.


  1. ^ "NatureServe Explorer 2.0 - Lygodium palmatum Climbing Fern". Retrieved 9 October 2020.
  2. ^ USDA, NRCS (n.d.). "Lygodium palmatum". The PLANTS Database ( Greensboro, North Carolina: National Plant Data Team. Retrieved 25 June 2015.
  • Lellinger, David B. A Field Manual of the Ferns & Fern Allies of the United States & Canada. Smithsonian Institution, Washington, DC. 1985.

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