Fig. 4. Cryo-SEM micrographs of glandular trichomes and their adhesive secretion in Roridula gorgonias. (A) Leaf margin bearing capitate trichomes of varying lengths with glandular secretion droplets, partly adhering to the metal surface of the sample holder and partly transformed into fluid filaments. (B) Short capitate trichomes against a background of multicellular bases of tentacle-shaped trichomes, and a layer of glandular secretion on the leaf epidermis. (C) Short capitate trichome on the abaxial leaf lamina consisting of a large spherical, glandular head, covered by adhesive secretion, and a multicellular stalk. (D) Detail of the surface of the glandular secretion released by short capitate trichomes. Note the uneven profile of the fluid surface. (E) The tip of a long, tentacle-shaped trichome releasing an ovoid secretion droplet with a smooth surface. Note that the secretion runs down along the stalk of the trichome. (F) Detail of the fractured multicellular stalk of a tentacle-shaped trichome covered with a thick layer of glandular secretion. ff, fluid filaments; gs, glandular secretion; tb, base of the tentacle-shaped trichome; mt, multicellular trichome. Scale bars, 500 µm (A); 100 µm (B,E); 20 µm (C,D,F).