As nouns the difference between carex and sedge
is that
carex is any member of the genus
carex of sedges while
sedge is any plant of the genus
carex , the true sedges, perennial, endogenous herbs, often growing in dense tufts in marshy places they have triangular jointless stems, a spiked inflorescence, and long grasslike leaves which are usually rough on the margins and midrib there are several hundred species or
sedge can be (
siege).