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Robinia pseudoacacia L.
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Locust, False Acacia
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Leguminosae
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Transversal section |
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Ring-porous. Gradual pore size transition from large earlywood pores to small pores of latewood. Earlywood pore ring uni- to triseriate, earlywood pores generally solitary, pore clusters in latewood. Conspicuous tyloses with thin walls in heartwood pores. Thick-walled ground tissue. Parenchyma paratracheal, abundant in earlywood, less frequent in latewood in proximity of vessels and vascular tracheids. Parenchyma in never continuous tangential to oblique bands. |
      
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Radial section |
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Simple perforation plates. Distinct spiral thickenings in vessels. Mostly homogeneous rays, rarely square marginal cells. Prismatic crystals in rays and crystal chains in axial parenchyma cells. Pits vestured. Libriform fibres and vascular tracheids present, fibre-tracheids absent. |
   
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Tangential section |
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Rays generally 3- to 4-seriate, sometimes up to 6-seriate. Parenchyma cells fusiform, in strands, often storied together with vessels and vascular tracheids. |
     
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Key characters |
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Ring-porous. Solitary pores in earlywood; pore clusters in latewood. Conspicuous tylosis. Rays generally 3- to 4-seriate, mostly homogeneous. Vasicentric parenchyma, spiral thickenings. |
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Remarks |
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Robinia pseudacacia introduced in Europe in 17th century. |
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