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Plant Science Week 5. Flowers are found in many kinds of shapes, colors and petal display.

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Presentation on theme: "Plant Science Week 5. Flowers are found in many kinds of shapes, colors and petal display."— Presentation transcript:

1 Plant Science Week 5

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3 Flowers are found in many kinds of shapes, colors and petal display

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7 Monocot flowers Wheat flowers Wheat flowers are not so attractive, but there is hope…… check out the Easter lily, which is also a monocot flower

8 Flowers Most flowers have four basic components: Sepals Sepals Petals Petals Stamens Stamens Pistil Pistil

9 Sepals The outer most covering of a flower bud  Protect internal parts of flower  Fold back when flower opens and helps support it  Individual sepals grouped together are known as the calyx

10 Petals Brightly colored modified leaves found in a circle just inside the calyx  Attract insect pollinators because they secrete aromatic liquid, nectar  Individual petals grouped together are known as the corolla

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12 Stamens Male reproductive apparatus found just inside of corolla  Consists of anther and filament Anther is a pollen producing structure Anther is a pollen producing structure  Pollen, a yellowish powder, contains sperm cells Filament supports and lifts anther Filament supports and lifts anther

13 Pistil The female reproductive organ, consisting of stigma, style and ovary, usually in the center of the flower, surrounded by the stamens  Topped by a sticky structure known as stigma where the pollen lands  Bottom of the pistil is a swollen base, the ovary, where seeds form from fertilized ovules  Connecting the stigma and ovary is the style

14 Pollination and Fertilization Pollination is the transfer of pollen from an anther to a stigma and fertilization is the uniting of a sperm with an egg.

15 Let’s look at this flower again in terms of pollination and fertilization The pistil is The entire Female Reproductive apparatus The stamen is the Entire male Reproductive apparatus

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17 Some Definitions Flower Pistil Anther Filament Stamen Pedicel Recepticle Sepal Stigma Style Ovary Reproductive organ of the plant Female reproductive structure of a flower composed of one/more carpels A part of the stamen that produces pollen The stalk that supports the anther The filament and anther together The stalk of an individual flower (in an inflorescence) The swollen tip of the pedicel where the flower parts are attached One of the parts of the calyx The sticky tip of the pistil A column of tissue that connects the ovary and stigma The structure that contains ovules

18 Pollen sac Pollen Inflorescence Peduncle The part of the anther that produces pollen The small, light, powdery grains that contain male cells A group of flowers, in a definite arrangement on an axis The stalk of an inflorescence, or of an individual flower


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