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|American climbing fern|
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 (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.
- "NatureServe Explorer 2.0 - Lygodium palmatum Climbing Fern". explorer.natureserve.org. Retrieved 9 October 2020. CS1 maint: discouraged parameter (link)
- "Lygodium palmatum". Natural Resources Conservation Service PLANTS Database. USDA. Retrieved 25 June 2015. CS1 maint: discouraged parameter (link)
- Lellinger, David B. A Field Manual of the Ferns & Fern Allies of the United States & Canada. Smithsonian Institution, Washington, DC. 1985.
- New International Encyclopedia. 1905. .