Xylopia collina and X. arenaria. A, C, F, H, I, J X. collina. A Monocarp, lateral view C Flower, lateral view F Stem gall H Habit I Bud J Torus with attached ovaries, lateral view B, D, E, G X. arenaria B Fruit D Habit E Flower bud with one outer petal removed, lateral view G Bud. A, F, H from Johnson et al. 1914 (OWU) B from Johnson & Murray 1890 (OWU) C, I, J from Johnson et al. 1913 (OWU) D, E, G from Johnson et al. 1937 (OWU).

  Part of: Johnson DM, Murray NA (2018) A revision of Xylopia L. (Annonaceae): the species of Tropical Africa. PhytoKeys 97: 1-252. https://doi.org/10.3897/phytokeys.97.20975