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Honey Fungus damage on Hers's Maple - Yorkshire Arboretum
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Hers's Maple with Honey Fungus - Yorkshire Arboretum
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Great Spruce Bark Beetle bleed - Yorkshire Arboretum
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Great Spruce Bark Beetle bleed - Yorkshire Arboretum
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Arizona Ash - Yorkshire Arboretum
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Ash Dieback on Arizona Ash - Yorkshire Arboretum
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Ash Dieback on Arizona Ash - Yorkshire Arboretum (2)
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Probable Phytophtora bleed on Dallimore horse-chestnut - Yorkshire Arboretum
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Bleeding Canker on Dallimore horse-chestnut - Yorkshire Arboretum
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Dallimore horse-chestnut - Yorkshire Arboretum
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Observatree volunteers at the Yorkshire Arboretum
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Great Spruce Bark Beetle bleeds and resin tubes s on Oriental Spruce - Yorkshire Arboretum
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Great Spruce Bark Beetle bleed on Oriental Spruce - Yorkshire Arboretum
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Walking past a Narrow-leaved Ash - Yorkshire Arboretum
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Colours of Fern-leaved Beech - Yorkshire Arboretum
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Fern-leaved Beech - Yorkshire Arboretum
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Jeffery's Pine - Yorkshire Arboretum
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Lion's tails on Jeffery's Pine - Yorkshire Arboretum
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'Sun Valley' Red Maple - Yorkshire Arboretum
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'Morgan' Freeman's Maple - Yorkshire Arboretum
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'Morgan' Freeman's Maple leaves - Yorkshire Arboretum
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'Wisley Bonfire' Tupelo - Yorkshire Arboretum
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'Wisley Bonfire' Tupelo leaves - Yorkshire Arboretum