#spike_rush__spikerush  a sedge of the genus Eleocharis
  supertype:  #sedge  grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers
  member of:  #genus_Eleocharis
  subtype:  #Chinese_water_chestnut__water_chestnut__waterchestnut__Eleocharis_dulcis  Chinese sedge yielding edible bulb-shaped tubers
  subtype:  #needle_spike_rush__needle_rush__slender_spike_rush__slenderspikerush__hair_grass__Eleocharis_acicularis  fine-leaved aquatic spike rush; popular as aerator for aquariums
  subtype:  #creeping_spike_rush__Eleocharis_palustris  cylindrical-stemmed sedge

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