Alexander fruit, light micrograph

Alexander fruit, light micrograph

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Credit: DR KEITH WHEELER/SCIENCE PHOTO LIBRARY

Caption: Alexander fruit. Light micrograph of a section through a fruit from an alexander (Smyrnium olusatrum) plant. The fruit falls when ripe into two one-seeded parts or mericarps (pentagons, top and bottom), which may remain hanging from the central rod or carpophore (two stalks, brown) for some time. Each mericarp shows a characteristic pattern, with usually five ribs (costae), between which are furrows (valleculae, brown veins). In the thickness of the wall are oil ducts known as vittae. These oil-ducts are continuous with others, which run through all parts of the plant. When ripe they separate and flatten and the wind blows them away. Magnification: x5, when printed 10 centimetres high.

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Keywords: alexander, alisander, anatomical, anatomy, angiosperm, angiosperms, biological, biology, botanical, botany, carpophore, carpophores, cell, cells, costae, cut out, cut outs, cut-out, cut-outs, cutout, cutouts, ducts, flora, fruit, histological, histology, horse parsley, light micrograph, mericarp, mericarps, microscope, nature, oil duct, plant, plants, rib, ribs, section, sectioned, seed, seeds, smyrnium olusatrum, stalk, stalks, structure, tissue, tissues, transverse, valleculae, vein, veins, vittae, white background, wildlife

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