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Aesculus hippocastanum L.
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Horse Chestnut
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Hippocastanaceae
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Transversal section |
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Diffuse- to almost semi-ring-porous. Pores solitary or in radial multiples of 2 to 5 (rarely more) pores. Thin-walled fibres. Growth ring boundaries weakly marked by a few (two to 3) rows of radially flattened latewood cells. Diffuse apotracheal parenchyma. |
   
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Radial section |
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Simple perforation plates. Distinct fine spiral thickenings. Homogeneous rays. Enlarged ray-vessel pits, pits occasionally simple. Libriform fibres present, fibre-tracheids absent. |
   
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Tangential section |
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Rays uniseriate, average height 6 to 15 cells. |
   
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Key characters |
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Diffuse-porous, pores often in radial multiples. Spiral thickenings. Uniseriate rays. |
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Remarks |
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Confusion with Populus is possible, however ray-vessel pits are distinctly bigger in Populus and the spiral thickenings are absent. The species was introduced in the 16th century in western Europe. |
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