Morus alba vs mulberry

Morus alba and mulberry both are nouns.

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

As nouns, mulberry is a hypernym of Morus alba; that is, mulberry is a word with a broader meaning than Morus alba:

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

Other hypernyms of Morus alba include mulberry tree.

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