9 Free Photos of Phellogen

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Gymnosperm Stem: One Year Pinus
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Gymnosperm Stem: Resin Ducts in Four Year Pinus
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Gymnosperm Stem: Secondary Growth in Four Year Pinus
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Woody Dicot Root: Vascular Cylinder in Quercus
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Gymnosperm Stem: Lateral Shoot Development in Five Year Pinus
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Gymnosperm Stem: Soft Wood in Pinus
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Gymnosperm Stem: Pith in Two Year Pinus
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Woody Dicot Root: Quercus
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Gymnosperm Stem: Lateral Shoot Development in Five Year Pinus
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