Figure 14 from: Robinson H, Skvarla JJ, Funk VA (2016) New and resurrected Hawaiian species of pilo (Coprosma, Rubiaceae) from the island of Maui. PhytoKeys 60: 33-48. https://doi.org/10.3897/phytokeys.60.6734

Figure 14 - Scanning electron micrographs of acetolyzed pollen from two collections of Hilliardiella capensis emphasizing spine variations. The surface seems to vary between sublophate and slightly echinolophate. A Polar view B Equatorial view C Lateral view D Polar view E Equatorial view F Subpolar view G Fragmented pollen surface H Grain fragment showing structural support of spine. (A–C Bayliss BS3686 D–H Gentry & Barolas 18914).