Fig. 5.

Transverse (A–C), tangential (D–F) and radial (G–I) light-microscope sections of woody Knoxieae showing vessel distribution (A–C), ray width (D–F) and ray composition (G–I) of primarily woody representatives (A, B, D, E, G, H) and secondarily woody members (C, F, I). (A, D, G) Dirichletia virgata; (B, E, H) Triainolepis polyneura; (C, F, I) Pentas zanzibarica. (A) Tendency to dendritic vessel pattern; (B) pronounced radial vessel mutiples ranging into dendritic pattern; (C) semi-ring porous wood, vessels mainly solitary and in short radial multiples; (D) body ray cells small and rounded; (E) body ray cells small and rounded; (F) rays consisting of mainly upright ray cells; (G) body ray cells procumbent (arrows); (H) body ray cells procumbent, enlarged ray cells containing raphides (arrows); and (I) multiseriate ray with mainly upright cells.