phytelephas vs plant genus

phytelephas and plant genus both are nouns.

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

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

phytelephas (noun)	plant genus (noun)
small genus of South American feather palms	a genus of plants