FIGURE 3. Pteridocalyx appunii. Calycophyll variation within the same inflorescence branch. A. Basal flower. B–D. Intermediate flowers, from base towards distal portion. E. Distal flower. A–E in Notes on calycophyllous Rubiaceae. Part V. A succinct overview of genera with calycophylls, and a revision of Pteridocalyx (Sipaneeae) with observations on distyly and calycophyll variation

FIGURE 3. Pteridocalyx appunii. Calycophyll variation within the same inflorescence branch. A. Basal flower. B–D. Intermediate flowers, from base towards distal portion. E. Distal flower. A–E: drawn from P.G. Delprete & P. Benjamin 12813 (CAY). Illustration by Piero Delprete.