Species Factsheets

Carex collinsii

Collin's Sedge

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State Status: Pennsylvania Threatened (PT)
PBS Status: Pennsylvania Threatened (PT)
Federal Status:

Global Rank: G4 rank interpretation
State Rank: S2

Did You Know?

This species is distinguished from all other carices with subulate perigynia by the reflexed perigynia.

Summary

Description

Collin's sedge (Carex collinsii) has slender arching stems up to 76cm tall and narrow leaves. The female flowers (perigynia), which are about 12mm long and very slender, extend at an oblique, downward-pointing angle from the axis of the spike. Male flowers are in a separate spike at the tip of the stem.

Rank Justification

Imperiled in the nation or state because of rarity due to very restricted range, very few populations (often 20 or fewer), steep declines, or other factors making it very vulnerable to extirpation from the nation or state.

Habitat Range

Habitat

Collin's sedge is a plant of sphagnum bogs and swamps.

Survey Dates

Flowers, fruits late June - mid-August

Distribution

Conservation

Threats

Collin's sedge is critically imperiled in New York and South Carolina and imperiled in Pennsylvania and Georgia. It is secure in New Jersey and Maryland.

Management

Water quality and quantity are important habitat factors.

Conservation Status Map

Collin's

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

Reference

https://www.rhodora.org/specialpublications/pdf/Standley-Field-Guide-Carex-of-New-England.pdf

NatureServe. 2018. NatureServe Explorer: An online encyclopedia of life [web application]. Version 7.1. NatureServe, Arlington, Virginia. Available at https://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.