Garden cosmos bud, light micrograph

Garden cosmos bud, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Garden cosmos flower bud. Light micrograph of a section through a flower bud from a garden cosmos (Cosmos bipinnatus) plant. The bottom triangular tissue of the flower stem is a circular receptacle made up of parenchyma cells (light blue) with veins (dark-blue). The flower head is enclosed by an outer involucre of 8 bracts. The top of the receptacle is covered by masses of small flowers (florets), with bracts around them, the capitulum. Each floret has a bract at the base and a flask-shaped ovary (blue), inside which is the ovule (purple). At the top of the ovary is the long tubular corolla (blue) made up of five toothed-petals. The stamens spring from the corolla tube and the five anthers are fused together at the top of the corolla. Each anther has

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Keywords: anatomical, anatomy, angiosperm, angiosperms, biological, biology, botanical, botany, bract, bracts, bud, capitulum, cell, cells, corolla, cosmos bipinnatus, flora, floret, florets, garden cosmos, grain, histological, histology, involucre, light micrograph, microscope, nature, ovaries, ovary, ovule, ovules, parenchyma, petal, petals, plant, plants, pollen grains, pollen sac, receptacle, sacs, section, sectioned, stem, structure, tissue, tissues, transverse, vein, veins, white background, wildlife

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