CPC Plant Profile: Wright's Spikerush
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Plant Profile

Wright's Spikerush (Eleocharis diandra)

Description
  • Global Rank: G2 - Imperiled
  • Legal Status: N/A
  • Family: Cyperaceae
  • State: CT, MA, NH, NY, ON, QC, VT
  • Nature Serve ID: 134571
  • Date Inducted in National Collection: 12/07/2021

Eleocharis diandra, or Wright's Spikesedge, is an annual, grass-like plant that only grows on the shores of rivers and lakes in the Northeastern United States and Eastern Canada. Like other sedges, it grows as a clump of skinny (1-4mm), unbranched leaves with flowers produced in spikes (a tight cluster of flowers) at the tips of the leaves. The entire plant only grows 2-25mm in height. Elecoharis diandra can be confused with another rare spikesedge, E. aestuum. Eleocharis diandra has pointed floral scales (tiny leaves) whereas E. aestuum has round floral scales. Wright's Spikesedge is of conservation concern because of its very restricted global range and specific habitat requirements. At the last review of its global status done by NatureServe in 2016, it was estimated that there were 6-20 occurrences of E. diandra, and few if any of those were estimated to have good viability. It is primarily threatened by shoreline activities on the rivers and lakes it inhabits.  

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Nomenclature
Taxon Eleocharis diandra
Authority C. Wright
Family Cyperaceae
CPC Number 44905
ITIS 512761
USDA ELDI2
Common Names Wright's Spikesedge | Wright's spikerush
Associated Scientific Names Eleocharis diandra | Eleocharis diandra var. depressa | Eleocharis obtusa | Eleocharis ovata | Trichophyllum diandrum
Distribution
State Rank
State State Rank
Connecticut SNR
Massachusetts S1
New Hampshire SH
New York S1
Ontario S1
Quebec S1
Vermont S2
Habitat

Ecological Relationships

Pollinators
Common Name Name in Text Association Type Source InteractionID

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