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Hart's-tongue Fern Asplenium scolopendrium var. americanum (Fern.) Kartesz & Gandhi |
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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 the 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. |
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| 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 | [-] |
Since the legal protection of this species was put in place, the number of populations in New York has remained stable. Within these populations there may be a slight decrease in numbers of individuals due to competition from invasives. At this time, this decrease appears to be negligible, but as these invasive species continue to spread, their impact is likely to be more evident.
| Long-term Trends | [-] |
Prior to protection, a number of large populations were lost. These were mainly impacted by mining operations. Today, new mining operations are not likely in areas where this fern is known.
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Home | Advanced Search | About Us Animal Guides | Plant Guides | Community Guides © 2004-2012 New York Natural Heritage Program, a partnership between the New York State Department of Environmental Conservation and the State University of New York College of Environmental Science and Forestry Please cite this page as:
New York Natural Heritage Program. 2013. Online Conservation Guide for Asplenium scolopendrium var. americanum. Available from: http://acris.nynhp.org/guide.php?id=9819. Accessed May 24th, 2013. 
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