rose vs Rosa chinensis

rose and Rosa chinensis both are nouns.

Word	Noun	Adjective	Verb	Adverb
rose	Yes	Yes	No	No
Rosa chinensis	Yes	No	No	No

As nouns, Rosa chinensis is a hyponym of rose; that is, Rosa chinensis is a word with a more specific, narrower meaning than rose:

rose: any of many shrubs of the genus Rosa that bear roses
Rosa chinensis: shrubby Chinese rose; ancestor of many cultivated garden roses

rose (noun)	Rosa chinensis (noun)
a dusty pink color	shrubby Chinese rose; ancestor of many cultivated garden roses
pinkish table wine from red grapes whose skins were removed after fermentation began
any of many shrubs of the genus Rosa that bear roses

rose (adjective)	Rosa chinensis (adjective)
of something having a dusty purplish pink color