Witch-hazel leaf surface, SEM

Witch-hazel leaf surface, SEM

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Caption: Witch-hazel leaf surface. Coloured scanning electron micrograph (SEM) of the upper surface of a witch-hazel (Hamamelis virginiana) leaf. A branching hair cell or trichome is seen at lower right. Trichomes may function in reducing water loss or in defending the plant against insects. The blade of the leaf comprises a layer of epidermal cells (green), which protect the leaf and secrete a waxy cuticle. Two stomata (leaf pores) are seen at top left and upper right. These are the sites of gaseous exchange. Witch- hazel is used in herbal medicine to treat sprains, burns and skin inflammation. Magnification: x130 when printed 10 centimetres wide.

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Keywords: alternative, botany, bundles, coloured, complementary, epidermal cells, epidermis, gaseous exchange, hair cell, hamamelis virginiana, herbal medicine, horizontal, leaf, leaves, medicinal herb, nature, plant, plants, pore, pores, scanning electron micrograph, sem, shrub, stoma, stomata, structure, surface, tree, trichome, vascular bundle, witch hazel, witch-hazel

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