genus Linanthus vs plant genus

genus Linanthus and plant genus both are nouns.

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

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

genus Linanthus: a genus of herbs of the family Polemoniaceae; found in western United States
plant genus: a genus of plants

genus Linanthus (noun)	plant genus (noun)
a genus of herbs of the family Polemoniaceae; found in western United States	a genus of plants