Primula polyantha vs polyanthus

Primula polyantha and polyanthus both are nouns.

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

As nouns, Primula polyantha and polyanthus are synonyms defined as:

Primula polyantha and polyanthus: florists' primroses; considered a complex hybrid derived from oxlip, cowslip, and common primrose

Primula polyantha (noun)	polyanthus (noun)
florists' primroses; considered a complex hybrid derived from oxlip, cowslip, and common primrose	florists' primroses; considered a complex hybrid derived from oxlip, cowslip, and common primrose