| Plants with incomplete flowers are divided into two groups. The monoecious plant group has male and female flowers on the same plant. Monoecious means "one house". Examples of monoecious plants are corn and squash. The tassel at the top of corn contains the male flower, and the ears hold the female flower. Squashes bear only male flowers early in their life cycle, but later in the growing season produce both male and female flowers.
 
Male and female flowers of squash
Plants that have only male or only female flowers on a single plant are called dioecious. Dioecious means "two houses". Hollies are an example of dioecious plants, since each holly plant has either male or female flowers. A plant of each sex must be planted in close proximity to produce berries on the female plant.
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Monoecious and Dioecious flowers