Origanum vulgare vs origanum

Origanum vulgare and origanum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Origanum vulgare	Yes	No	No	No
origanum	Yes	No	No	No

As nouns, origanum is a hypernym of Origanum vulgare; that is, origanum is a word with a broader meaning than Origanum vulgare:

Origanum vulgare: aromatic Eurasian perennial
origanum: any of various fragrant aromatic herbs of the genus Origanum used as seasonings

Origanum vulgare (noun)	origanum (noun)
aromatic Eurasian perennial	any of various fragrant aromatic herbs of the genus Origanum used as seasonings