low-bush blueberry vs low blueberry

low-bush blueberry and low blueberry both are nouns.

Word	Noun	Adjective	Verb	Adverb
low-bush blueberry	Yes	No	No	No
low blueberry	Yes	No	No	No

As nouns, low-bush blueberry and low blueberry are synonyms defined as:

low-bush blueberry and low blueberry: low-growing deciduous shrub of northeastern North America having flowers in compact racemes and bearing sweet dark blue berries

Other synonyms of low-bush blueberry include Vaccinium angustifolium, Vaccinium pennsylvanicum.

low-bush blueberry (noun)	low blueberry (noun)
low-growing deciduous shrub of northeastern North America having flowers in compact racemes and bearing sweet dark blue berries	low-growing deciduous shrub of northeastern North America having flowers in compact racemes and bearing sweet dark blue berries