Flower Structure Anatomy Diagram — a labelled NEET Biology diagram with a definitions lexicon.
Flower Structure Anatomy Diagram Labelled parts: Petals (corolla), Sepals (calyx), Stamen (androecium), Anther, Filament, Pistil (gyneceum), Stigma, Style, Ovary, Ovules, Thalamus, Pedicel, Aestivation, Valvate, Twisted, Imbricate, Vexillary, Quincuncial, Placentation, Marginal, Axile, Parietal, Basal, Free central. The corolla refers to the collective petals of a flower. These petals are often brightly colored and serve to attract specific pollinators. FYI: The color and shape of the corolla are crucial for identifying the plant family and its pollination syndrome. The calyx is the collective term for the sepals of a flower. Sepals typically enclose and protect the flower bud before it opens. FYI: The calyx is usually green and leaf-like, while the corolla is often brightly colored and petal-like. The androecium is the collective term for all the stamens of a flower. Each stamen consists of an anther (pollen-producing sac) and a filament. FYI: The number of stamens can be used to classify plants; for example, in the family Fabaceae, the androecium is often diadelphous (9+1 arrangement). The gynoecium is the collective term for all the carpels (pistils) of a flower. It is the female reproductive whorl, consisting of the stigma, style, and ovary. FYI: If the gynoecium is composed of multiple separate carpels, the flower is described as having a syncarpous ovary. The style is the stalk connecting the stigma to the ovary. It serves as a pathway for pollen grains to reach the ovules. FYI: The style is often the part that grows longer to facilitate the movement of pollen towards the stigma. The ovary is the swollen, basal part of the gynoecium that contains one or more ovules. After fertilization, the ovary develops into the fruit. FYI: The type of ovary (e.g., superior or inferior) is a key feature used in plant taxonomy. Ovules are structures located inside the ovary that contain the female gametophyte (egg cell). They are the precursors to seeds. FYI: Pollination leads to the fertilization of the ovule, and the mature ovule develops into a seed. Aestivation describes the arrangement of petals or sepals in a flower bud. It refers to how the floral parts overlap or are positioned relative to each other. FYI: Common types include valvate (no overlap), imbricate (overlapping), and twisted (spiraled). Valvate aestivation occurs when the margins of the petals or sepals meet at the edges without overlapping. This is the simplest form of aestivation. FYI: Examples of valvate aestivation are found in the family Convolvulaceae (e.g., Ipomoea ). Twisted aestivation occurs when the petals or sepals are arranged in a spiral or twisted manner, overlapping progressively around the center. FYI: This type of aestivation is characteristic of certain families, indicating a specific developmental pattern. Imbricate aestivation is characterized by the overlapping of petals or sepals, where the arrangement is irregular and not strictly sequential. FYI: The arrangement of petals in the family Sapindaceae (like Aegle ) is often described as imbricate. Vexillary aestivation is a specialized form of imbricate aestivation found in the family Papilionaceae (pea family). It involves a standard (banner), two wings, and a keel. FYI: The characteristic 'pea flower' structure (standard, wings, keel) is a defining feature of the Papilionaceae family. Quincuncial aestivation is a pattern where the petals or sepals are arranged in groups of five, with the fifth petal/sepal positioned in the center, like the corners of a quincunx. FYI: This arrangement is often seen in flowers belonging to the family Malvaceae.