cypress sedge vs sedge

cypress sedge and sedge both are nouns.

Word	Noun	Adjective	Verb	Adverb
cypress sedge	Yes	No	No	No
sedge	Yes	No	No	No

As nouns, sedge is a hypernym of cypress sedge; that is, sedge is a word with a broader meaning than cypress sedge:

cypress sedge: tufted sedge of temperate regions; nearly cosmopolitan
sedge: grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers

cypress sedge (noun)	sedge (noun)
tufted sedge of temperate regions; nearly cosmopolitan	grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers