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Gymnocarpium appalachianum Pryer & Haufler. Common name: Appalachian Oak Fern. Phenology: Jun-Sep. Habitat: Moist, rocky forests, at medium to high elevations. Distribution: Endemic to the c. and s. Appalachians (known from ne. WV, nw. VA, sc. PA, and disjunct in nw. NC and OH). In NC, this species is limited to a single site, below the north-facing summit cliffs on Bluff Mountain, Ashe County, where seepage results in extensive ice formations which frequently persist until June.

Origin/Endemic status: Endemic

Taxonomy Comments: Electrophoretic, morphologic, and DNA analyses show that it is one of the diploid parents of the widespread allotetraploid G. dryopteris (Pryer 1992; Pryer & Haufler 1993; Rothfels et al. 2014). Karyotype = AA.

Synonymy ⓘ: = FNA2, K4, NS, Pa, POWO, Va, Pryer & Haufler (1993); = n/a — RAB; < Dryopteris disjuncta (Ledeb.) C.V.Morton — F; < Gymnocarpium dryopteris (L.) Newman ssp. brittonianum Sarvela — C, G, W, WV. Basionym: Gymnocarpium appalachianum Pryer & Haufler 1993

Links to other floras: = Gymnocarpium appalachianum - FNA2

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Wetland Indicator Status:

  • Eastern Mountains and Piedmont: UPL (taxonomic split from wetland indicator species)
  • Great Plains: FACU (taxonomic split from wetland indicator species)
  • Midwest: FAC (taxonomic split from wetland indicator species)
  • Northcentral & Northeast: FACU (taxonomic split from wetland indicator species)

Heliophily ⓘ: 1

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image of plant© Gary P. Fleming | Original Image ⭷

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Horticultural Information

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