Fig. 4 in Monograph of the western Indian Ocean genus Paracephaelis (Rubiaceae - Pavetteae), with description of thirteen new species

Fig. 4. Pollen of Paracephaelis Baill.; SEM images. A, C. Polar view. B, D. Equatorial view. E–F. Apocolpium. G–I. Mesocolpium. J–K. Ectocolp and mesoaperture. L. Endocolp with annulus. M. End of endocolp, diverging into terminal horns. N–O. Pollen wall. From Lebosaka 9397-RN (P. longipedicellata De Block sp. nov., A–B, E, G, M–N); Dumetz 1230 (P. saxatilis (Scott Elliot) De Block, C–D, F, I, K); and Capuron 20419-SF (P. seyrigii De Block sp. nov., H, J, L, O).