Figure 20.

Light microscopy (A, B) and scanning electron microscopy (C–J) micrographs of the Mush MT (same grain: A–J). A. Equatorial view, high focus. B. Equatorial view, optical cross-section. C. Oblique equatorial view. D. Grain broken, showing the inner side of the pollen. E. Close-up of interapertural area. F. Close-up showing thickening around aperture on the inner side of pollen wall. G. Close-up of interapertural area. H. Close-up showing section through pollen wall. I. Close-up of aperture (arrows). J. Close-up showing section through pollen wall. Scale bars – 10 µm (A–D), 1 µm (E–J).