Cyperus esculentus vs sedge

Cyperus esculentus and sedge both are nouns.

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

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

Cyperus esculentus: European sedge having small edible nutlike tubers
sedge: grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers

Cyperus esculentus (noun)	sedge (noun)
European sedge having small edible nutlike tubers	grasslike or rushlike plant growing in wet places having solid stems, narrow grasslike leaves and spikelets of inconspicuous flowers