mulberry vs Morus alba

mulberry and Morus alba both are nouns.

Word	Noun	Adjective	Verb	Adverb
mulberry	Yes	No	No	No
Morus alba	Yes	No	No	No

As nouns, Morus alba is a hyponym of mulberry; that is, Morus alba is a word with a more specific, narrower meaning than mulberry:

mulberry: any of several trees of the genus Morus having edible fruit that resembles the blackberry
Morus alba: Asiatic mulberry with white to pale red fruit; leaves used to feed silkworms

Other hyponyms of mulberry include white mulberry, black mulberry, Morus nigra, Morus rubra, red mulberry.

mulberry (noun)	Morus alba (noun)
sweet usually dark purple blackberry-like fruit of any of several mulberry trees of the genus Morus	Asiatic mulberry with white to pale red fruit; leaves used to feed silkworms
any of several trees of the genus Morus having edible fruit that resembles the blackberry