Species of Acacia sampled in the sub-tropical region. (A–D) Transverse sections (TS); (E–H) tangential longitudinal sections (TLS). (A and E) Acacia elongata (Plurinerves) LH65. Some vessels occluded with gum, thick-walled fibres, axial parenchyma aliform and confluent, rays uniseriate. (B and F) Acacia fimbriata (Phyllodineae) LH61. Vessels in groups, very thick-walled and gelatinous fibres, axial parenchyma limited in extent and mainly scanty paratracheal to vasicentric, rays uniseriate. (C and G) Acacia complanata (Plurinerves) LH101. Vessels mainly in radial multiples, fibres thick walled, axial parenchyma scanty paratracheal to aliform, rays uniseriate. (D and H) Acacia bauerlenii (Plurinerves) LH70. Fibres thick walled, axial parenchyma scanty paratracheal to aliform and confluent, rays uniseriate. Prismatic crystals are not apparent. Scale bars = 100 μm.