Vaccinium pallidum vs blueberry

Vaccinium pallidum and blueberry both are nouns.

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

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

Vaccinium pallidum: low deciduous shrub of the eastern United States bearing dark blue sweet berries
blueberry: any of numerous shrubs of the genus Vaccinium bearing blueberries

Other hypernyms of Vaccinium pallidum include blueberry bush.

Vaccinium pallidum (noun)	blueberry (noun)
low deciduous shrub of the eastern United States bearing dark blue sweet berries	sweet edible dark-blue berries of either low-growing or high-growing blueberry plants
	any of numerous shrubs of the genus Vaccinium bearing blueberries