Vaccinium ashei vs blueberry

Vaccinium ashei and blueberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
Vaccinium ashei	Yes	No	No	No
blueberry	Yes	No	No	No

As nouns, blueberry is a hypernym of Vaccinium ashei; that is, blueberry is a word with a broader meaning than Vaccinium ashei:

Vaccinium ashei: shrub of southeastern United States grown commercially especially for canning industry
blueberry: any of numerous shrubs of the genus Vaccinium bearing blueberries

Other hypernyms of Vaccinium ashei include blueberry bush.

Vaccinium ashei (noun)	blueberry (noun)
shrub of southeastern United States grown commercially especially for canning industry	sweet edible dark-blue berries of either low-growing or high-growing blueberry plants
	any of numerous shrubs of the genus Vaccinium bearing blueberries