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pl.n. (used with a sing. or pl. verb)
An annual plant (Platystemon californicus) native to the southwest United States and Mexico and cultivated for its showy cream-colored to yellowish flowers.
(Plants) (functioning as singular or plural) a Californian papaveraceous plant, Platystemon californicus, with small cream-coloured or yellow flowers on long flower stalks
n., pl. -cups. (used with a sing. or pl. v.)
a Californian plant, Platystemon californicus, of the poppy family, having small, pale yellow or cream-colored flowers.