mei vs Prunus mume

mei and Prunus mume both are nouns.

Word	Noun	Adjective	Verb	Adverb
mei	Yes	No	No	No
Prunus mume	Yes	No	No	No

As nouns, mei and Prunus mume are synonyms defined as:

mei and Prunus mume: Japanese ornamental tree with fragrant white or pink blossoms and small yellow fruits

Other synonyms of mei include Japanese apricot.

mei (noun)	Prunus mume (noun)
Japanese ornamental tree with fragrant white or pink blossoms and small yellow fruits	Japanese ornamental tree with fragrant white or pink blossoms and small yellow fruits