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Rhamnus cathartica L.
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Purgin Buckthorn
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Rhamnaceae
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Transversal section |
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Diffuse- to semi-ring-porous. Pores generally solitary or in small clusters, encircled by vascular tracheids and parenchyma, forming dendritic bands, very distinct from fibres. Paratracheal parenchyma and also in narrow, uni- to triseriate bands at the beginning of the earlywood. Heartwood vessels with gumlike deposits. |
         
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Radial section |
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Simple perforation plates. Heterogeneous rays (type 1 to type 11). Fine spiral thickenings in vessels and fiber-tracheids. Mainly libriform fibers, few fiber-tracheids. |
   
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Tangential section |
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Predominantly biseriate rays, rarely tri- or uniseriate. Average height of multiseriate rays: 8-20 cells. |
   
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Key characters |
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Diffuse-porous. Flame-like groupings of pores. |
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