Unisexual Flowers and Self-Pollination: Monoecious vs Dioecious

Botany Question: Can Unisexual Flowers Self-Pollinate?

If male and female flowers on same plant (monoecious), it can self-pollinate. If plant has only one sex (dioecious), needs opposite-sex plant.

Monoecious: both sexes on same individual (simultaneously or consecutively).
Dioecious: separate male and female plants.
Androecious: male only.
Gynoecious: female only.

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