Arnica stigma, SEM

Arnica stigma, SEM

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Caption: Arnica stigma. Coloured scanning electron micrograph (SEM) of the stigma (yellow) of an arnica (Arnica montana) flower. This is the top part of the female reproductive structure (carpel) of the flower. Pollen grains containing the male sex cells become trapped on the surface of the stigma. From here they grow a tube down into the ovary (not seen) to allow the male sex cells to fertilize the female sex cells (ovules). Arnica is a member of the daisy family (Asteraceae). It grows in mountainous regions of Europe. The arnica flower is used in herbal medicine to aid healing, control bleeding and to benefit the heart. Magnification: x280 when printed 10cm wide.

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Keywords: alternative, arnica montana, asteraceae, botany, carpel, coloured, complementary, compositae, daisy, female, flower, flowering, flowering part, herbal medicine, homeopathic, homeopathy, medicinal, nature, parts, plant, plants, reproduction, reproductive, scanning electron micrograph, sem, sexual, stigma

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