Fig. 3

Formation of farina at the single cell level. a Stereomicroscope image showing examples of wool exit points (red arrows) on the surface of the leaf of D. tapetodes. Scale bar = 500 μm. b SEM image of glandular trichomes, including an example of a mature glandular trichome producing large quantities of woolly farina (red arrow). Scale bar = 50 μm. c SEM image showing farina wool exit points (red arrows) from glandular trichomes. Scale bar = 10 μm. d SEM image showing glandular trichome of P. marginata covered with powdery flavone farina. Scale bar = 10 μm