Species Factsheets

Cymophyllus fraserianus

Fraser's Sedge

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State Status: Pennsylvania Endangered (PE)
PBS Status: Pennsylvania Endangered (PE)
Federal Status:

Global Rank: G4 rank interpretation
State Rank: S1

Did You Know?

Even though both male and female flowers are in the infloresccence the antehers and stigma are not usually active at the same time, so the plant is not self-pollinating.

Cymophyllus fraserianus

Description

Fraser's sedge (Cymophyllus fraserianus) is a perennial grass, the only species in the genus Cymophyllus. Its stems, which have a triangular cross-section, grow 10-40cm above a set of broad basal leaves.

Rank Justification

Critically imperiled in the nation or state because of extreme rarity (often 5 or fewer occurrences) or because of some factor(s) such as very steep declines making it especially vulnerable to extirpation from the state.

Habitat

Fraser's sedge grows in rich mountain forests on moist slopes and along streams, within a fairly restricted range in the southern Appalachian Mountains.

Survey Dates

Flower, fruit April - July

Distribution

Fraser's

Threats

The narrow range of Fraser's sedge and the loss of its habitat have reduced it to a relatively small number of scattered populations. There is some concern that the existing populations may be so small that they are falling victim to genetic drift, a loss of genetic diversity that can reduce a species' ability to adapt to changes in its environment.

Management

Preservation of Fraser's sedge will require conservation of suitable habitat to allow existing populations to expand, control of invasive competitors, and protection from human disturbance. If sedge populations are able to expand and reestablish, the risk of genetic drift will be greatly reduced.

Conservation Status Map

Fraser's

Map Legend

NatureServe. 2017. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available http://explorer.natureserve.org.

http://uswildflowers.com/detail.php?SName=Cymophyllus%20fraserianus

  • NatureServe. 2018. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available at http://www.natureserve.org/explorer
  • Pennsylvania Natural Heritage Program. 2018.
  • Rhoads, A.F. and W.M. Klein, Jr. 1993. The Vascular Flora of Pennsylvania. American Philosophical Society, Philadelphia, Pennsylvania. Rhoads, A.F. and T.A. Block.
  • 2007. The Plants of Pennsylvania: An Illustrated Manual. 2nd edition. University of Pennsylvania Press, Philadelphia, Pennsylvania.
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