Halesia vs dicot genus

Halesia and dicot genus both are nouns.

Word	Noun	Adjective	Verb	Adverb
Halesia	Yes	No	No	No
dicot genus	Yes	No	No	No

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

Halesia: deciduous small trees or shrubs of China and eastern North America
dicot genus: genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination

Other hypernyms of Halesia include magnoliopsid genus.

Halesia (noun)	dicot genus (noun)
deciduous small trees or shrubs of China and eastern North America	genus of flowering plants having two cotyledons (embryonic leaves) in the seed which usually appear at germination