cinchona tree vs cinchona

cinchona tree and cinchona both are nouns.

Word	Noun	Adjective	Verb	Adverb
cinchona tree	Yes	No	No	No
cinchona	Yes	No	No	No

As nouns, cinchona is a hypernym of cinchona tree; that is, cinchona is a word with a broader meaning than cinchona tree:

cinchona tree: small tree of Ecuador and Peru having very large glossy leaves and large panicles of fragrant pink flowers; cultivated for its medicinal bark
cinchona: any of several trees of the genus Cinchona

Other hypernyms of cinchona tree include chinchona.

cinchona tree (noun)	cinchona (noun)
small tree of Ecuador and Peru having very large glossy leaves and large panicles of fragrant pink flowers; cultivated for its medicinal bark	any of several trees of the genus Cinchona
	medicinal bark of cinchona trees; source of quinine and quinidine