Primula polyantha vs primula

Primula polyantha and primula both are nouns.

Word	Noun	Adjective	Verb	Adverb
Primula polyantha	Yes	No	No	No
primula	Yes	No	No	No

As nouns, primula is a hypernym of Primula polyantha; that is, primula is a word with a broader meaning than Primula polyantha:

Primula polyantha: florists' primroses; considered a complex hybrid derived from oxlip, cowslip, and common primrose
primula: any of numerous short-stemmed plants of the genus Primula having tufted basal leaves and showy flowers clustered in umbels or heads

Other hypernyms of Primula polyantha include primrose.

Primula polyantha (noun)	primula (noun)
florists' primroses; considered a complex hybrid derived from oxlip, cowslip, and common primrose	any of numerous short-stemmed plants of the genus Primula having tufted basal leaves and showy flowers clustered in umbels or heads