Hackelia vs plant genus

Hackelia and plant genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hackelia	Yes	No	No	No
plant genus	Yes	No	No	No

As nouns, plant genus is a hypernym of Hackelia; that is, plant genus is a word with a broader meaning than Hackelia:

Hackelia (noun)	plant genus (noun)
stickweed; beggar's lice	a genus of plants