Lappula vs plant genus

Lappula and plant genus both are nouns.

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

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

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