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Trichomes on the sunflower leaf surface, with the NGTs (non-glandular trichomes), LGTs (linear glandular trichomes) and CGTs (capitate glandular trichomes) labelled accordingly. The bundle sheath extensions (BSEs) are also labelled. (A–C) Scanning electron micrographs of the leaf surface. (D–F) Light micrographs showing leaf cross-sections (1 µm thick), with the sections stained using toluidine blue. (G–I) Light micrographs (80 µm thick) of fresh leaf cross-sections without staining.
