genus Euphorbia vs Euphorbia cyparissias

genus Euphorbia and Euphorbia cyparissias both are nouns.

Word	Noun	Adjective	Verb	Adverb
genus Euphorbia	Yes	No	No	No
Euphorbia cyparissias	Yes	No	No	No

genus Euphorbia (noun)	Euphorbia cyparissias (noun)
type genus of the Euphorbiaceae: very large genus of diverse plants all having milky juice	Old World perennial having foliage resembling cypress; naturalized as a weed in the United States