Camellia japonica vs japonica

Camellia japonica and japonica both are nouns.

Word	Noun	Adjective	Verb	Adverb
Camellia japonica	Yes	No	No	No
japonica	Yes	No	No	No

As nouns, Camellia japonica and japonica are synonyms defined as:

Camellia japonica and japonica: greenhouse shrub with glossy green leaves and showy fragrant rose-like flowers; cultivated in many varieties

Camellia japonica (noun)	japonica (noun)
greenhouse shrub with glossy green leaves and showy fragrant rose-like flowers; cultivated in many varieties	deciduous thorny shrub native to Japan having red blossoms
	greenhouse shrub with glossy green leaves and showy fragrant rose-like flowers; cultivated in many varieties