Proboscidea vs plant genus

Proboscidea and plant genus both are nouns.

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

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

Proboscidea: in some classifications included in the genus Martynia and hence the two taxonomic names for some of the unicorn plants
plant genus: a genus of plants

Proboscidea (noun)	plant genus (noun)
an order of animals including elephants and mammoths	a genus of plants
in some classifications included in the genus Martynia and hence the two taxonomic names for some of the unicorn plants