Hairs on a leaf of lemon balm

Hairs on a leaf of lemon balm

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Caption: Lemon balm leaf hairs. Coloured scanning electron micrograph (SEM) of the underside of a leaf of the herb lemon balm, Melissa officinalis. Numerous hairs (trichomes) cover the undersurface of the leaf. These unbranced multicellular hairs may have both a protective function against predators and serve to reduce evaporation from the leaf. Stomata or pores appear as small, green rounded structures; they serve to exchange gases and water from the leaf surface. Lemon balm is both a herbal and medicinal plant used in perfumes, as a sedative and to treat headache and toothache. Magnification: x900 at 6x7cm size.

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Keywords: botany, hair, herb, leaf, leaf hair, leaf hairs, leaves, lemon balm, medicinal plant, melissa officinalis, nature, plant, plants, stoma, trichome, trichomes, type

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