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Juglans regia L.
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Walnut
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Juglandaceae
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Transversal section |
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Diffuse-porous to semi-ring-porous. Pores large, infrequent, solitary or in radial rows of 2 to 4 cells. Tyloses frequent in pores of heartwood. Apotracheal parenchyma, both diffuse and in short, tangential bands. Paratracheal parenchyma scanty. |
           
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Radial section |
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Simple perforation plates. Rays homogeneous, occasionally slightly heterogeneous with one to several rows of square marginal cells. Libriform-fibres present, fibre-tracheids absent. In large parenchyma cells (idioblasts) frequently prismatic cristals. |
   
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Tangential section |
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Rays generally bi- to 4-seriate, rarely uni- and 5-seriate. Average ray height 15 to 30 cells. |
   
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Key characters |
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Pores large, infrequent, often in radial multiples of 2 to 4 pores. Rays bi- to 4-seriate. |
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