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–CBayliss BS3686D–HGentry & Barolas 18914).