New York Natural Heritage Program
Narrow-leaved Sedge
Carex amphibola Steud.
Monocots
Carex amphibola var. amphibola Troy Weldy
Family: Sedge Family (Cyperaceae)

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: G5
A Global Rarity Rank of G5 means: This species is demonstrably secure globally, though it may be quite rare in parts of its range, especially at the periphery.


Did you know?
The scientific name amphibola means ambiguous (Fernald 1970). This plant was briefly listed as historical within New York State, but it was rediscovered at two sites in Dutchess County (Astor Point and Vassar College).

State Ranking Justification [-]
There are two known populations of this sedge and approximately ten historical populations. The current range is limited to the mid-Hudson Valley. There has been confusion with the identification due to taxonomic changes and some people not keying specimens to variety (e.g. Carex grisea used to be called Carex amphibolia var. turgida, but many specimens are not keyed to variety). These plants tend to be in low-lying wet areas that are subject to periodic inundation. There may be some threat from invasive species and habitat alteration.

Short-term Trends [-]

Long-term Trends [-]