CPC Plant Profile: Tidal Spikerush
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Plant Profile

Tidal Spikerush (Eleocharis aestuum)

Copyright © 2017 Donald Cameron Photo Credit: Copyright © 2017 Donald Cameron
  • Global Rank: G3 - Vulnerable
  • Legal Status: N/A
  • Family: Cyperaceae
  • State: CT, DE, MA, ME, NJ, NY, PA, QC, VT
  • Nature Serve ID: 145734
  • Date Inducted in National Collection: 12/07/2021

Tidal Spikesedge, Eleocharis aestuum, is an annual, aquatic, grass-like plant found in freshwater tidal communities in the Northeastern United States and Quebec, Canada. Like many sedges, it grows as a clump of skinny, non-branched leaves. The flowers are produced in a spike (a tight cluster of flowers) at the tips of the leaves. Eleocharis aestuum was only recently classified as distinct from E. diandra and E. ovata. Eleocharis diandra has pointed floral scales (tiny leaves) whereas E. aestuum has round floral scales. Eleocharis ovata typically has three stamens (stalks that produce pollen in the flower) whereas E. aestuum typically has two. Tidal Spikesedge is of conservation concern because of its very restricted global range and specific habitat requirements.

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Taxon Eleocharis aestuum
Authority Hines ex A. Haines
Family Cyperaceae
CPC Number 44904
ITIS 808402
Common Names Tidal Spikesedge | tidal spikerush
Associated Scientific Names Eleocharis aestuum
State Rank
State State Rank
Connecticut SNR
Delaware SH
Massachusetts SNR
Maine S2?
New Jersey SNR
New York S1
Pennsylvania SNR
Quebec S1
Vermont S1

Ecological Relationships

Common Name Name in Text Association Type Source InteractionID

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