What does the word sedge mean?

Usage examples for sedge

  1. About two weeks later the eggs hatch into sluggish little caterpillars which feed upon the sedge leaves, apparently eating only at night and hiding in crevices between stones by day. – Butterflies Worth Knowing by Clarence M. Weed
  2. Beside the pools were occasional tall sheaves of flags and sedge, and about the plain a few bushes, these forming the only obstructions to a view otherwise unbroken. – The Hand of Ethelberta by Thomas Hardy