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sepal, any of the outer parts of a flower that enclose and protect the unopened flower bud. The sepals on a flower are collectively referred to as the calyx. They are sterile floral parts and may be either green or leaflike or composed of petal -like tissue. From their base and along most of their length, sepals remain either separate ...
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- Classification of A Flower
- Parts of A Flower and Their Function
- Reproduction in Flowering Plants
A typical flower has four main parts or whorls referred to as the calyx, corolla, androecium, and gynoecium. The outermost whorl of the flower has green, leafy structures known as sepals. The sepals, collectively called the calyx, help to protect the unopened bud. The second whorl is comprised of petals, usually, brightly colored and are collective...
Based on the symmetry of the flowers can be described in to following types: 1. Actinomorphic: Flowers can be divided into two halves through any vertical plane. 2. Zygomorphic: Flowers can be divided into two equal halves only along one vertical plane. 3. Asymmetrical: Flowers which cannot be divided into equal halves by any plane. Based on the po...
Sepals
Sepals are modified leaves that typically function as protection for the flower in bud and often as support for the petals when in bloom. They are sterile floral parts and may be either green or leaf-like or composed of petal-like tissue. Collectively, the sepals are referred to as the calyx, the outermost whorl of parts that form a flower.
Petals
Petals are modified leaves that surround the reproductive parts of flowers. They are often brightly colored or unusually shaped to attract pollinators. Together, all petals of a flower are called the corolla. Petals are usually accompanied by another set of modified leaves (sepals), that collectively form the calyx and lie beneath the corolla. Petal often consists of two parts: the upper, broad part, similar to leaf blade, also called the blade and the lower part, narrow, similar to leaf peti...
Stamens
Stamen can be described as the male reproductive part of a flower. In all but a few extant angiosperms, the stamen consists of a long slender stalk, the filament, with a two-lobed anther at the tip. The anther consists of four saclike structures (microsporangia) that produce pollen for pollination. Small secretory structures, called nectaries, are often found at the base of the stamens; they provide food rewards for insect and bird pollinators. All the stamens of a flower are collectively cal...
Reproduction in flowering plants begins with pollination, the transfer of pollen from anther to stigma on the same flower or to the stigma of another flower on the same plant (self-pollination) or from the anther on one plant to the stigma of another plant (cross-pollination). Once the pollen grain lodges on the stigma, a pollen tube grows from the...
May 24, 2023 · Vegetative Parts of a Flower (Perianth) Petals (Corolla): Petals are usually the most noticeable part of a flower and serve a vital function in attracting pollinators. The vibrant colors and enticing scents of petals attract pollinators such as bees, butterflies, and birds. Sepals (Calyx): These are small, modified leaves that enclose and ...
Aug 26, 2008 · The sepals and petals are both sterile parts of a flower. The leaf-like sepals surround the flower, protecting it before it blooms. Petals are colorful and often patterned features that are more ...
Flowers are composed of sets of highly modified leaves arranged in whorls. The outermost whorl of a flower is called the calyx and is composed of sepals. Inside the calyx is the corolla, which is composed of petals. The sepals are often smaller and less colorful than the petals, but this general rule can be misleading.
May 18, 2024 · The Flower. A flower compact generative shoot with sterile, male and female zones, specifically in that order, other flower terms see in the separate glossary in the text (Figure \(\PageIndex{3}\)) is a compact generative shoot that is comprised of three zones: sterile (perianth), male (androecium), and female (gynoecium) (Figure \(\PageIndex{2}\)).
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The appendages are known as floral parts or floral organs. They are sterile and reproductive. The sepals and petals which constitute the calyx and corolla respectively are the sterile parts. The stamens compose the androecium, whereas the free or united carpels compose the gynoecium. Structure of Various Parts of a Flower: Pedicel:
