Cyperus longus vs sedge

Cyperus longus and sedge both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cyperus longus	Yes	No	No	No
sedge	Yes	No	No	No

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

Cyperus longus: European sedge having rough-edged leaves and spikelets of reddish flowers and aromatic roots
sedge: grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers

Cyperus longus (noun)	sedge (noun)
European sedge having rough-edged leaves and spikelets of reddish flowers and aromatic roots	grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers