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    Lily stem. Light micrograph(LM) of section through part of lily (Lilium) stem. Thin outer epidermis surrounds layer of cortex. At center is pith, which contains numerous vascular bundles (yellow) — Stock Photo
    Lily stem. Light micrograph(LM) of section through part of lily (Lilium) stem. Thin outer epidermis surrounds layer of cortex. At center is pith, which contains numerous vascular bundles (yellow)
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis — Stock Photo
    Broom stem. Light micrograph (LM) of transverse section through stem of common broom (Salicornia europaea) plant. Broom is drought plant (xerophyte) with ribbed stems and branches to increase area for photosynthesis
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside — Stock Photo
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside
    Colorful lily pads growing in freshwater lake — Stock Photo
    Colorful lily pads growing in freshwater lake
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept — Stock Photo
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background — Stock Photo
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    Side view of crop anonymous female harvester touching fresh mandarins growing on green tree in sunlight — Stock Photo
    Side view of crop anonymous female harvester touching fresh mandarins growing on green tree in sunlight
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside — Stock Photo
    Crop unrecognizable female in bright footwear lying with crossed legs among blossoming daisies under cloudy blue sky in countryside
    Passion flower pollen — Stock Photo
    Passion flower pollen
    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells — Stock Photo
    Maize root. Light micrograph (LM) of section through root of maize plant (Zea mays) showing typical monocot arrangement of vascular bundles. central vascular cylinder is comprised of central cluster of parenchyma cells
    Sincere adult ethnic female looking at camera on meadow touching blossoming flowers in countryside on blurred background — Stock Photo
    Sincere adult ethnic female looking at camera on meadow touching blossoming flowers in countryside on blurred background
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    From below scenic view of high bamboo twigs with ribbed surface growing in woods in daylight — Stock Photo
    From below scenic view of high bamboo twigs with ribbed surface growing in woods in daylight
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Close up of blossoming pink flowers with gentle petals and green leaves — Stock Photo
    Close up of blossoming pink flowers with gentle petals and green leaves
    Colorful lily pads growing in freshwater lake — Stock Photo
    Colorful lily pads growing in freshwater lake
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant — Stock Photo
    Helianthus stem. Light micrograph (LM) of stem of perennial sunflower (Helianthus sp.) in cross-section showing vascular bundles (green, yellow). Vascular tissues transport water and dissolved substances inside plant
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree. — Stock Photo
    Elm stem. Light micrograph (LM) of cross-section through woody stem of elm (Ulmus procera) tree.
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Female in hat with eyes closed holding blossoming yellow flowers in countryside field under cloudy sky
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower.
    Overhead view of raw chicken eggs on round shaped plate with blossoming Lavandula flowers on purple napkin and marble surface — Stock Photo
    Overhead view of raw chicken eggs on round shaped plate with blossoming Lavandula flowers on purple napkin and marble surface
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside — Stock Photo
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside
    Green corn leaves — Stock Photo
    Green corn leaves
    Close-up illustration of pollen grain of mimosa and mimosa flowers. — Stock Photo
    Close-up illustration of pollen grain of mimosa and mimosa flowers.
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky
    Blooming Papaver flower with curved tender petals growing on meadow in evening countryside — Stock Photo
    Blooming Papaver flower with curved tender petals growing on meadow in evening countryside
    Back view of young female in brassiere with green palm tree foliage behind head looking away on blue background — Stock Photo
    Back view of young female in brassiere with green palm tree foliage behind head looking away on blue background
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky — Stock Photo
    Anonymous female in hat covering face with blossoming yellow flowers in countryside field under cloudy sky
    Pollen threads and brochosomes — Stock Photo
    Pollen threads and brochosomes
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower. — Stock Photo
    Colored scanning electron micrograph of pollen grains from Nymphaeaceae water lily flower.
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background — Stock Photo
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background
    Pollen grains from a bellflower — Stock Photo
    Pollen grains from a bellflower
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background — Stock Photo
    Sincere adult ethnic female looking away on meadow touching blossoming flowers in countryside on blurred background
    From below of palm trees with wavy green and faded branches growing in Tenerife Spain — Stock Photo
    From below of palm trees with wavy green and faded branches growing in Tenerife Spain
    Top view of crop unrecognizable person with blossoming yellow chrysanth with tender petals and pleasant scent — Stock Photo
    Top view of crop unrecognizable person with blossoming yellow chrysanth with tender petals and pleasant scent
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept — Stock Photo
    Overhead view of bright green slices of succulent plant leaf representing Christmas tree concept
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background — Stock Photo
    Blossoming pink flowers with gentle petals and green leaves in vase on gray background
    Digital illustration of pollen grains on anther of Chinese hibiscus flower. — Stock Photo
    Digital illustration of pollen grains on anther of Chinese hibiscus flower.
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside — Stock Photo
    Crop unrecognizable ethnic female touching blossoming sunflower with pleasant aroma and gentle petals in countryside