Eucalyptus rostrata vs eucalypt

Eucalyptus rostrata and eucalypt both are nouns.

Word	Noun	Adjective	Verb	Adverb
Eucalyptus rostrata	Yes	No	No	No
eucalypt	Yes	No	No	No

As nouns, eucalypt is a hypernym of Eucalyptus rostrata; that is, eucalypt is a word with a broader meaning than Eucalyptus rostrata:

Eucalyptus rostrata: somewhat crooked red gum tree growing chiefly along rivers; has durable reddish lumber used in heavy construction
eucalypt: a tree of the genus Eucalyptus

Other hypernyms of Eucalyptus rostrata include eucalyptus, eucalyptus tree.

Eucalyptus rostrata (noun)	eucalypt (noun)
somewhat crooked red gum tree growing chiefly along rivers; has durable reddish lumber used in heavy construction	a tree of the genus Eucalyptus