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Lygodium palmatum (Bernhardi) Swartz. American Climbing Fern, Hartford Fern. Phen: Jul-Sep. Hab: Bogs, moist thickets, swamp forests, sandstone outcrops, roadside ditches and roadbanks, in strongly acid soils. Dist: NH, VT, NY, and MI south to SC, n. GA, and n. AL, widely scattered in its distribution except in the Cumberland Plateau of KY, TN, and AL, where it is most common.

Origin/Endemic status: Native

Taxonomy Comments: Garrison (1992) discussed two forms of the species, "one with long appressed hairs scattered over the lower (abaxial) side of the sterile leaflets and the other relatively hair-free". The two forms appear to be geographically differentiated, the pubescent form predominating south and west of Maryland, the glabrous form occurring primarily in the Northeast. Both forms are present in our area. Further research is needed to determine the taxonomic significance of this variation in pubescence.

Synonymy: = C, F, Fl1, FNA2, G, K1, K3, K4, NE, NY, Pa, RAB, S13, Sf, Tat, Tn, Va, W, WV

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Wetland Indicator Status:

  • Atlantic and Gulf Coastal Plain: FACW
  • Eastern Mountains and Piedmont: FACW
  • Midwest: FACW
  • Northcentral & Northeast: FACW

Heliophily ?: 6

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Alan Cressler: Lygodium palmatum, Cherohala Skyway, Cherokee National Forest, Monroe County, Tennessee 1 by Alan Cressler source | Original Image ⭷
image of plant© Alan Cressler: Lygodium palmatum, Bandy Creek Area, Big South Fork National Recreation Area, Scott County, Tennessee 1 by Alan Cressler source | Original Image ⭷
image of plant© Alan Cressler: Lygodium palmatum, Highway 180, Choestoe, Union County, Georgia 1 by Alan Cressler source | Original Image ⭷

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