Fig. 4.

Wood anatomical illustrations of Impatiens using light microscopy (A–C, E, F) and scanning electron microscopy (D). (A) Impatiens vitellina, transverse section showing mainly solitary vessels and ray-like areas (arrows). (B) Impatiens dewildeana, transverse section vessels arranged solitarily or in clusters, rayless wood. (C) Impatiens shirensis, detail of transverse section showing scanty paratracheal parenchyma (arrows). (D) Impatiens flaccida, tangential section showing wide gaping intervessel pitting. (E) Impatiens balfourii, tangential section showing true rays with exclusively upright ray cells (arrows). (F) Impatiens vitellina, tangential section showing broad ray-like areas with fibre-like ray cells (arrows).