Stamina

Latin name for the stamens (ez. stems) of a flower; see under .

The flower bud of the cultivated grapevine is a hermaphrodite flower, i.e. it contains the male and female sexual organs united in a single flower bud, which makes fertilisation much easier than in unisexual plants. The male sexual organs are the pollen-producing stamens (stamina), which consist of the stalk-shaped filament and the yellowish anthers at the tip. The entirety of all the stamens of a flower is called the androeceum. An anther contains four pollen sacs in which the pollen grains are formed with the haploid (n=19) male gametes (fertilising hormones). In the vine flower, five of these free-standing stamens surround the female sexual organ, the ovary, in a circle. This consists of two fused carpels, which contain two compartments with ovules inside. For this reason, the grapevine is an opaque flowering plant.

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Ovary, pistil and stigma

The ovary merges at its tip into the style, which ends in the stigma. The disc-shaped stigma is a spongy tissue that...

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Stamina

Flower bud

Ovary, pistil and stigma

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