Capsicum baccatum vs capsicum

Capsicum baccatum and capsicum both are nouns.

Word	Noun	Adjective	Verb	Adverb
Capsicum baccatum	Yes	No	No	No
capsicum	Yes	No	No	No

As nouns, capsicum is a hypernym of Capsicum baccatum; that is, capsicum is a word with a broader meaning than Capsicum baccatum:

Capsicum baccatum: plant bearing very small and very hot oblong red fruits; includes wild forms native to tropical America; thought to be ancestral to the sweet pepper and many hot peppers
capsicum: any of various tropical plants of the genus Capsicum bearing peppers

Other hypernyms of Capsicum baccatum include capsicum pepper plant, pepper.

Capsicum baccatum (noun)	capsicum (noun)
plant bearing very small and very hot oblong red fruits; includes wild forms native to tropical America; thought to be ancestral to the sweet pepper and many hot peppers	any of various tropical plants of the genus Capsicum bearing peppers