Figure 3

Scanning electron micrographs (SEM) of the leaves of U. molinae. (A) Abaxial surface showing stomatal distribution. (B) Adaxial surface showing impressed midrib and glabrescent wavy surface. (C) Unicellular hairs and bases of deciduous trichomes on the abaxial midrib (arrows). (D) SEM micrograph of subepidermal secretory cavity, visible as a pronounced swelling. Scale bars = 100 μm (A, B) and 50 μm (C, D).