New York Natural Heritage Program
Hart's-tongue Fern
Asplenium scolopendrium var. americanum (Fern.) Kartesz & Gandhi
Asplenium scolopendrium var. americanum Stephen M. Young
Family: Spleenwort Family (Aspleniaceae)

State Protection: Threatened
listed species are those with: 1) 6 to fewer than 20 extant sites, or 2) 1,000 to fewer than 3,000 individuals, or 3) restricted to not less than 4 or more than 7 U.S.G.S. 7 minute topographical maps, or 4) listed as threatened by U.S. Department of Interior.

Federal Protection: Threatened
Listed as Threatened in the United States by the US Department of Interior.

State Rarity Rank: S2
A State Rarity Rank of S2 means: This plant is threatened/imperiled in New York because of rarity (typically 6-20 populations or few remaining individuals) or is vulnerable to extirpation from New York due to biological factors.

Global Rarity Rank: G4T3
A Global Rarity Rank of G4T3 means: Vulnerable globally - The subspecies/variety is at moderate risk of extinction due to rarity or other factors; typically 80 or fewer populations or locations in the world, few individuals, restricted range, few remaining acres (or miles of stream), and/or recent and widespread declines. (The species as a whole is apparently secure globally.)

Did you know?
The American Hart's-tongue fern is listed by the US Fish & Wildlife Service as federally threatened. This is one of only a handful of New York plants protected under the Endangered Species Act. Approximately 90% of the known plants in the US are found right here in New York.

State Ranking Justification [-]
There are fewer than twenty populations or sub-populations of this federally threatened species in New York. These populations are restricted to the Syracuse area. Most of the populations are currently threatened by various invasive species, but in particular, swallow-wort is a serious problem.

Short-term Trends [-]

Long-term Trends [-]