Flower Wallpaper
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Flower Wallpaper
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Wallpaper Detail
- Submited:2007-04-23 08:32:22
- File Size:203237
- Resolution:1280x960
- File Format:2
- Category:Flower
- Downloads:4
- Views:30
- Number of rates:0
- Rating:0.0000
About Flower
Flowers - photo wallpapers: A flower is the reproductive organ of those plants classified as angiosperms (flowering plants; Division Magnoliophyta). The function of a flower is to produce seeds through sexual reproduction. For the higher plants, seeds are the next generation, and serve as the primary means by which individuals of a species are dispersed across the landscape. After fertilization, a flower develops into a fruit containing the seed(s). Flower anatomy. A flower is regarded a modified stem (Eames, 1961) with shortened internodes and bearing, at its nodes, structures that may be highly modified leaves. In essence, a flower structure forms on a modified shoot or axis with an apical meristem that does not grow continuously (growth is determinate). The stem is called a pedicel, the end of which is the torus or receptacle. The parts of a flower are arranged in whorls on the torus. The four main parts or whorls (starting from the base of the flower or lowest node and working upwards) are as follows: Poppycalyx – the outer whorl of sepals; typically these are green, but are petal-like in some species. Corolla – the whorl of petals, which are usually thin, soft, and colored to attract insects that help the process of pollination. Androecium (from Greek andros oikia: man's house) – one or two whorls of stamens, each a filament topped by an anther where pollen is produced. Pollen contains the male gametes. Gynoecium (from Greek gynaikos oikia: woman's house) – consisting of a pistil, with one or more carpels, which are the female reproductive organs and contain an ovary with ovules (female gametes). The sticky tip of tip of the pistil, the stigma, is the receptor of pollen. The supportive stalk, the style becomes the pathway for pollen tubes to grow from pollen grains adhering to the stigma, to the ovules, carring the reproductive material.
Although the floral structure described above is considered the "typical" structural plan, plant species show a wide va...
Flowers - photo wallpapers: A flower is the reproductive organ of those plants classified as angiosperms (flowering plants; Division Magnoliophyta). The function of a flower is to produce seeds through sexual reproduction. For the higher plants, seeds are the next generation, and serve as the primary means by which individuals of a species are dispersed across the landscape. After fertilization, a flower develops into a fruit containing the seed(s). Flower anatomy. A flower is regarded a modified stem (Eames, 1961) with shortened internodes and bearing, at its nodes, structures that may be highly modified leaves. In essence, a flower structure forms on a modified shoot or axis with an apical meristem that does not grow continuously (growth is determinate). The stem is called a pedicel, the end of which is the torus or receptacle. The parts of a flower are arranged in whorls on the torus. The four main parts or whorls (starting from the base of the flower or lowest node and working upwards) are as follows: Poppycalyx – the outer whorl of sepals; typically these are green, but are petal-like in some species. Corolla – the whorl of petals, which are usually thin, soft, and colored to attract insects that help the process of pollination. Androecium (from Greek andros oikia: man's house) – one or two whorls of stamens, each a filament topped by an anther where pollen is produced. Pollen contains the male gametes. Gynoecium (from Greek gynaikos oikia: woman's house) – consisting of a pistil, with one or more carpels, which are the female reproductive organs and contain an ovary with ovules (female gametes). The sticky tip of tip of the pistil, the stigma, is the receptor of pollen. The supportive stalk, the style becomes the pathway for pollen tubes to grow from pollen grains adhering to the stigma, to the ovules, carring the reproductive material.
Although the floral structure described above is considered the "typical" structural plan, plant species show a wide va...
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