| 21. | They have separate male and female flowers on the same plant.
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| 22. | Male and female flowers are mixed together in the same clump.
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| 23. | Single white female flowers grow to the water surface on very long stalks.
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| 24. | Both male and female flowers are present on the same plant, but separate.
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| 25. | As the spathe wilts, the female flowers lose receptivity to pollination.
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| 26. | Male and female flowers are markedly different in size and color.
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| 27. | The plant bears male flowers in clusters and solitary female flowers.
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| 28. | Male flowers on spikes, female flowers on small clusters or spikes.
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| 29. | Female flowers develop into globular drupes surrounded by a waxy coating.
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| 30. | Two female flowers are located at the base of the inflorescence.
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