magnoliopsid genus vs Magnoliopsida

magnoliopsid genus and Magnoliopsida both are nouns.

Word	Noun	Adjective	Verb	Adverb
magnoliopsid genus	Yes	No	No	No
Magnoliopsida	Yes	No	No	No

magnoliopsid genus (noun)	Magnoliopsida (noun)
genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination	comprising seed plants that produce an embryo with paired cotyledons and net-veined leaves; divided into six (not always well distinguished) subclasses (or superorders): Magnoliidae and Hamamelidae (considered primitive), Caryophyllidae (an early and distinctive offshoot), and three more or less advanced groups: Dilleniidae, Rosidae, Asteridae