Figure 4 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 4 - Scanning electron micrographs of acetolyzed pollen of echinolophate Bothriocline and Cyanthillium and sublophate-lophate Distephanus. A–C Bothriocline schimperi Oliv. & Hiern ex Benth. A Equatorial view, note incipient colpus of 3 connected lacunae centered on pore B Near polar view C Fractured grain D–F Cyanthillium cinereum (L.) H. Rob. D Equatorial view E Lateral view with apertures on sides F Lateral view G–I Distephanus angustifolia (DC.) H Rob. & B. Kahn. G Polar view H Equatorial view I Lateral view. (A-C, F. Meyer 8159; D-F, Evans 344; G-I, Sidley 2211)