New York Natural Heritage Program
Appalachian Shoestring Fern
Vittaria appalachiana Farrar & Mickel
Ferns
Vittaria appalachiana Alan Cressler
Family: (Vittariaceae)

State Protection: Endangered
listed species are those with: 1) 5 or fewer extant sites, or 2) fewer than 1,000 individuals, or 3) restricted to fewer than 4 U.S.G.S. 7 minute topographical maps, or 4) species listed as endangered by U.S. Department of Interior.

Federal Protection: Not Listed

State Rarity Rank: S1
A State Rarity Rank of S1 means: This plant is endangered/critically imperiled in New York because of extreme rarity (typically 5 or fewer populations or very few remaining individuals) or is extremely vulnerable to extirpation from New York due to biological factors.

Global Rarity Rank: G4
A Global Rarity Rank of G4 means: This species is apparently secure globally (typically with more than 100+ populations), though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
Most familiar ferns are recognized by their sporophytes - the spore-producing phase of their life cycle. However, Appalachian Shoestring Fern is known only from its gametophytic, or gamete-producing phase. Though sexual reproduction (and the resulting sporophytes) is unknown in this species, local populations are maintained via gemmae, or vegetative buds which can grow into new individuals.

State Ranking Justification [-]
There are only three existing populations of unknown quality and one historical location in New York.

Short-term Trends [-]

Long-term Trends [-]