POLYANTHUS
polyanthus, Primula polyantha
(noun) florists’ primroses; considered a complex hybrid derived from oxlip, cowslip, and common primrose
Source: WordNet® 3.1
Etymology
Noun
polyanthus (plural polyanthuses or polyanthi)
(botany) The oxlip, Primula elatior, so called because the peduncle bears a many-flowered umbel.
A bulbous flowering plant of the genus Narcissus.
Source: Wiktionary
Pol`y*an"thus, n.; pl. Polyanthuses. Etym: [NL., fr. Gr. [Written
also polyanthos.] (Bot.)
(a) The oxlip. So called because the peduncle bears a many-flowered
umbel. See Oxlip. (b) A bulbous flowering plant of the genus
Narcissus (N. Tazetta, or N. polyanthus of some authors). See Illust.
of Narcissus.
Source: Webster’s Unabridged Dictionary 1913 Edition