LM images of transverse (A, C, D) and longitudinal sections (B, E, F) through developing flowers of Dialypetalanthus fuscescens. A. Through pedicel at height of bracteoles. B. Through early floral developmental stage. C. Through successive floral developmental stage with central depression (encircled in white). D. Detail of central depression with early stamens (encircled in yellow). E–F. Through developing flower, with central depression and apical cavity (encircled in purple) with developing stamens (yellow arrows) surrounded by two originating carpellary bulges (purple arrowheads). Colour code: purple, gynoecium; yellow, androecium. Symbols: Bo, bracteole; ca, calyx (lobe); co, corolla (lobe); Pc, pedicel; red asterisk, floral apex.

  Part of: Vrijdaghs A, De Block P, De Toni KLG, Smets E, Robbrecht E (2022) Floral ontogeny links Dialypetalanthus (Condamineeae) with the floral developmental morphology of other Rubiaceae. Plant Ecology and Evolution 155(3): 394-403. https://doi.org/10.5091/plecevo.84606