Secondary phloem of Mcvaughia sergipana. A–C Transverse section: A Phloem non-stratified, with scattered fiber-sclereids (arrows); Rays dilating slightly B Crystalliferous axial parenchyma arranged in diffuse-in-aggregate narrow bands (arrowhead) C Crystalliferous axial parenchyma with druse crystals, forming diffuse in aggregate bands, isolated fiber-sclereids present (arrowhead) D A ray 3 cells wide, fiber-sclereids and axial parenchyma in tangential section E Bands of crystalliferous parenchyma with druses evident also in radial section; Rays heterocellular mixed. Scale bars: 200 μm (A), 100 μm (B–C, E), 50 μm (D).