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The wild radish, Raphanus sativus, has become a model for studying the mating behaviour of plants.

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Description
The seeds of wild radish germinate in response to the first winter rains of California's Mediterranean climate (chapter 2) and the plants flower by January. Flowering may continue to late spring or early summer, depending on the length of the wet season. During their flowering season, wild radishes are pollinated by a wide variety of insects, including honeybees, syrphid flies, and butterflies. Wild radish flowers have both male (stamens) and female (pistils) parts and produce both pollen and ovules. However, a wild radish plant cannot pollinate itself, a condition called self-incompatibility. Because they must mate with other plants, a researcher working on wild radish can more easily control matings between plants.
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