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Black-edge Sedge Carex nigromarginata Schwein. |
Monocots |  Printer Friendly Version (PDF) |
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 the Interior. Federal Protection: Not Listed 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: 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? Just a few years ago, this sedge was considered historical within New York (i.e. not seen in at least 20 years). David Werier rediscovered this sedge and he and others have been finding more populations. As more people learn to identify this plant, more populations will likely be encountered. |
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| State Ranking Justification | [-] |
There are eight existing populations and about 10 historical populations but more of this species are likely to be found in the Hudson Highlands if surveys are done early enough to identify the species before it sheds its perigynia.
| Short-term Trends | [-] |
At least five new populations of this sedge have been located since 2002. Since this sedge is difficult to identify once its fruits shed, fruits relatively early in the season (fruits mostly shed by mid-June), and is easily overlooked, these five new populations were probably overlooked in the past. Therefore, it will probably be hard to determine if this species is expanding its range north as new populations are discovered. Overall, short term trends are not clear.
| Long-term Trends | [-] |
There are 10 populations which have not been seen in recent years. It is unknown if these populations are still extant since searches to many of these sites have not been conducted. In addition, at least five new populations have been seen in recent years. Therefore, long term trends are not clear but most likely the species is at least not declining. This needs to be backed up by further survey work.
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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 Carex nigromarginata. Available from: http://www.acris.nynhp.org/guide.php?id=9508. Accessed June 19th, 2013. 
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