New York Natural Heritage Program
Schweinitz's Sedge
Carex schweinitzii Dewey ex Schwein.
Carex schweintzii David Werier
Family: Sedge Family (Cyperaceae)

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: Not Listed

State Rarity Rank: S2S3
A State Rarity Rank of S2S3 means: Imperiled or Vulnerable in New York - Very vulnerable to disappearing from New York, or vulnerable to becoming imperiled in New York, due to rarity or other factors; typically 6 to 80 populations or locations in New York, few individuals, restricted range, few remaining acres (or miles of stream), and/or recent and widespread declines. More information is needed to assign a single conservation status.

Global Rarity Rank: G3G4
A Global Rarity Rank of G3G4 means: Vulnerable globally, or Apparently Secure -- At moderate risk of extinction, with relatively few populations or locations in the world, few individuals, and/or restricted range; or uncommon but not rare globally; may be rare in some parts of its range; possibly some cause for long-term concern due to declines or other factors. More information is needed to assign a single conservation status.

Did you know?
The specific epithet schweinitzii was named in honor of Lewis David de Schweinitz (1780-1834) who among other subjects studied the genus Carex.

State Ranking Justification [-]
There are seventeen known populations and nearly 50 historical locations. Some of these historical locations could not be relocated after multiple survey attempts; however, new populations have been found elsewhere. This plant prefers calcareous seeps, a habitat type with a very limited range. New York has a large number populations compared to other states, so it carries a higher responsibility in ensuring this species' long-term survival. Michigan and Ontario also appear to have a large number of populations.

Short-term Trends [-]

Long-term Trends [-]