Christmas fernPolystichum acrostichoides
The High Country's most common evergreen fern. Leathery, once-pinnate fronds with a stocking-shaped pinna at the base. The sori are arranged in rows on the upper pinnae and ripen through the year. Found in every habitat from the rich cove forest to the acidic cove; one of the few ferns that grows well in dry shade. The name comes from the evergreen habit; the fronds are sold as Christmas greenery.
Royal fernOsmunda spectabilis
The big fern of the wet meadows. Osmunda is one of the oldest fern genera and the royal fern is its largest High Country representative — fronds can reach five feet in good conditions. The fertile fronds are distinct, with a separate pinna at the tip that carries the sporangia; the visual difference between sterile and fertile fronds is the name's origin. Wet meadows, seeps, and streamsides.
Cinnamon fernOsmunda cinnamomea
The cinnamon-stick fern. The fertile fronds are entirely separate, vertical, and covered in cinnamon-brown sporangia — the color and the texture give the name. Sterile fronds are similar to royal fern but the pinnae are more deeply cut. Grows in the same wet habitats as royal fern; the two are often found together. The fiddleheads are edible and harvested commercially in the spring.
Interrupted fernOsmunda claytoniana
The fern with the gap in the middle. The fertile fronds have one or two pairs of fertile pinnae set midway up the frond — the dark brown sporangia interrupt the green sterile pinnae above and below. The visual interruption is the name. Same wet habitat as royal and cinnamon; the three Osmundas often grow together in the same colony.
Maidenhair fernAdiantum pedatum
The High Country's most elegant fern. The frond divides into a horseshoe shape at the top of the stipe, with the pinnae radiating horizontally from the arc. The black stipe is the diagnostic feature — no other High Country fern has a black wiry stem. Rich, moist soil; the Linville gorge floor and the north-facing slopes above 3,000 feet are the best sites. The fiddleheads are tightly coiled and edible.
Lady fernAthyrium asplenioides
The High Country's most common deciduous fern. The fronds are twice-pinnate, lacy, and yellow-green; the sori are on the underside of the pinnae in curved lines that follow the vein pattern. Grows in every moist habitat from the cove forests to the open meadows; one of the most adaptable ferns. The fiddleheads are the standard edible fiddlehead of the spring markets.
Hay-scented fernDennstaedtia punctilobula
The meadow fern. The fronds are lacy, twice-pinnate, and yellow-green; the crushed pinnae smell of fresh-cut hay — the diagnostic feature. Grows in open meadows, road cuts, and forest edges; forms large colonies that exclude other plants. The aggressive rhizome makes it a dominant species in disturbed acidic habitats. Hay-scented fern is the only High Country fern that smells like anything.
Walking fernAsplenium rhizophyllum
The cliff fern that walks. The simple, undivided fronds taper to a tip that roots where it touches the rock — the new plant then sends out more walking tips, and the colony slowly migrates across the cliff face. Found only on limestone or other calcareous rock; the Linville gorge floor is the High Country's best site. A rare fern globally and one of the reasons the Linville gorge is botanically significant.
Ebony spleenwortAsplenium platyneuron
The small spleenwort. Once-pinnate fronds with a dark brown (ebony) stipe and rachis; the pinnae are alternate and the sori are arranged in pairs on the underside. Grows in rock crevices, road cuts, and the base of trees; one of the most common spleenworts in the eastern US. The Linville gorge has a population of the closely-known maidenhair spleenwort (A. trichomanes) as well.
Filmy fernHymenophyllum tunbrigense
The translucent fern. The frond is one cell thick — light passes through the tissue and the fern appears translucent in the right light. Found only on the most sheltered, consistently moist rock faces in the High Country; the Linville gorge has one of the few inland populations in the US. A globally rare fern and the High Country's most botanically significant species.
Chain fernWoodwardia areolata
The net-veined fern. The fronds are once-pinnate with net-veined pinnae and long, chain-like sori that run perpendicular to the midvein — the diagnostic feature. Wet, acidic soil in seeps and along streams; the Linville gorge and the Watauga river bottoms are the best sites. The closely-known Virginia chain fern (W. virginica) grows in similar habitats.
Rattlesnake fernBotrychium virginianum
The single-leaf fern. The frond divides into a sterile leafy blade and a separate fertile spike that carries the sporangia — the visual division is the name. The fertile spike resembles a rattlesnake's rattle before the sporangia ripen. Found in the rich cove forest and on the lower slopes; one of the few ferns that grows in deep shade. The closely-known cut-leaved grape fern (B. dissectum) grows in similar habitats.