Polygonum vs magnoliopsid genus

Polygonum and magnoliopsid genus both are nouns.

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

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

Polygonum: diverse genus of herbs or woody subshrubs of north temperate regions
magnoliopsid genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Polygonum include dicot genus.

Polygonum (noun)	magnoliopsid genus (noun)
diverse genus of herbs or woody subshrubs of north temperate regions	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination