dryland blueberry vs blueberry

dryland blueberry and blueberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
dryland blueberry	Yes	No	No	No
blueberry	Yes	No	No	No

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

dryland blueberry: 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 dryland blueberry include blueberry bush.

dryland blueberry (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