| Noun | 1. | genus Platystemon - one species: creamcups dilleniid dicot genus - genus of more or less advanced dicotyledonous trees and shrubs and herbs family Papaveraceae, Papaveraceae, poppy family - herbs or shrubs having milky and often colored juices and capsular fruits creamcups, Platystemon californicus - California plant with small pale yellow flowers |