 The collection of many flowers may be shaped and arranged to appear collectively as a single individual flower, sometimes called a pseudanthium in the Asteraceae, and also in "Euphorbia".The majority of species are monoecious (bearing male and female flowers on the same plant), although some are dioecious with male and female flowers occurring on different plants.It is not unusual for the central cyathia of a cyme to be purely male, and for lateral cyathia to carry both sexes.