In botany, the usual term for a plant with either only one male or only one female organ on the flower bud. The term "secondary unisexual" means that the species is originally bisexual by its dispositions, but one sex is suppressed. It is therefore not a bisexual hermaphrodite, as is the rule among cultivated grape varieties. The cultivated unisexual specimens are so-called purely female grape varieties that have to be fertilised with pollen from other plants. They are mostly intended for table grape cultivation and only rarely for wine production. See also under vine systematics and grapevine.
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