Tidal Spikerush / Center For Plant Conservation
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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
  • Lifeform: Graminoid
  • Date Inducted in National Collection:

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.

Where is Tidal Spikerush (Eleocharis aestuum) located in the wild?

States & Provinces:

Tidal Spikerush can be found in Connecticut, Delaware, Maine, Massachusetts, New Jersey, New York, Pennsylvania, Quebec, Vermont

Which CPC Partners conserve Tidal Spikerush (Eleocharis aestuum)?

CPC's Plant Sponsorship Program provides long term stewardship of rare plants in our National Collection. We are so grateful for all our donors who have made the Plant Sponsorship Program so successful. We are in the process of acknowledging all our wonderful plant sponsorship donors on our website. This is a work in progress and will be updated regularly.

Conservation Actions

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Taxon Eleocharis aestuum
Authority Hines ex A. Haines
Family Cyperaceae
CPC Number 44904
ITIS 808402
Duration Perennial
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


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