Figure 3 from: Ickert-Bond S, Wen J (2013) A taxonomic synopsis of Altingiaceae with nine new combinations. PhytoKeys 31: 21-61. https://doi.org/10.3897/phytokeys.31.6251

Figure 3 - Pollen diversity in Altingiaceae. A–D Liquidambar excelsa E–H Liquidambar gracilipes I–L Liquidambar styraciflua A Pentaporate, spheroidal pollen grain B Details of pore showing the characteristic disintegration of the tectum C Details of the tectal surface displaying scabrae and irregularly-shaped perforations D Details of tectate-columellate exine, note columellae slightly thicker than those of comparable magnification in H and E Pentaporate, spheroidal pollen grain F Details of pore showing the characteristic disintegration of the tectum G Details of the tectal surface displaying scabrae and irregularly-shaped perforations H Details of tectate-columellate exine with thinner columellae than in D of Liquidambar excelsa I Pentaporate, spherical pollen grain J Details of circular pore showing eroded tectum in the pore proper K Details of tectal surface with irregularly-shaped perforations and scabrae L Details of the tectate-columellate exine with thin columellae as compared to Liquidambar excelsa in D. Scale bars: A, E, I = 2 µm, scale bars: B, F, G, J = 1 µm, scale bars: C, H, K, L= 500 nm, scale bar: D= 200 nm