New York Natural Heritage Program
Black Sedge
Carex nigra (L.) Reichard
Monocots
Carex nigra Stuart Kooge
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 specific epithet nigra means black and is probably in reference to the dark purple-brown to black pistillate scales and occasionally black apices of the perigynia.

State Ranking Justification [-]
There are no known populations and only a single voucher specimen. About a half-dozen unvouchered reports have been made, but nothing more recent than the early 1900s. Southern New England has apparently experience a significant decline of Carex nigra populations due to land-use changes. The same appears to be true within New York. More survey work is needed at the sites where it was previously reported, as well as other sites that seem to have suitable habitat.

Short-term Trends [-]

Long-term Trends [-]