Species Factsheets

Carex pauciflora

Few-flowered Sedge

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

Global Rank: G5 rank interpretation
State Rank: S1

Carex pauciflora

Description

Few-flowered Sedge is a perennial, relatively delicate grass-like plant that produces wide-spreading underground stems, or rhizomes. The three-sided aerial stems may grow to 0.5 m in height, but are often much shorter. The leaves include a sheathing basal portion and an elongate and narrow blade that is alternately arranged and only about 1-2 mm in width. The minute flowers, which appear in spring, are clustered at the tip of the stem, with the male flowers at the very top and several (usually 1-6) female flowers directly below. The plant is most recognizable when fruiting in late spring and early summer, with the fruits being enclosed in sac-like structures, or perigynia, which in this species are particularly elongate and slender, being about 7 mm in length and 0.8-1.2 mm in width, tapered to a pointed tip, and conspicuously point downward.

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

The species grows in bogs and peaty wetlands, especially on floating sphagnum moss mats around bog pools.

Survey Dates

Fruits late May - early September

Distribution

Few-flowered Sedge has a transcontinental range across the cooler regions of North America. In Pennsylvania, it is considered a northern species, and has been documented historically in the glaciated northeastern and northwestern counties.

Few-flowered

Management

The viability of populations of Few-flowered Sedge and its habitat may be enhanced by creating buffers and protecting the natural hydrology around bogs and controlling invasive species. Few-flowered Sedge is an indicator species for bog habitats that feature various orchids, insectivorous plants such as sundew, bladderwort, and pitcher plant, and other interesting species.

Conservation Status Map

Few-flowered

Map Legend

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

  • 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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