Protea mellifera vs protea

Protea mellifera and protea both are nouns.

Word	Noun	Adjective	Verb	Adverb
Protea mellifera	Yes	No	No	No
protea	Yes	No	No	No

As nouns, protea is a hypernym of Protea mellifera; that is, protea is a word with a broader meaning than Protea mellifera:

Protea mellifera: Australian shrub whose flowers yield honey copiously
protea: any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones

Protea mellifera (noun)	protea (noun)
Australian shrub whose flowers yield honey copiously	any tropical African shrub of the genus Protea having alternate rigid leaves and dense colorful flower heads resembling cones