(A–D) Papillose labellum of Teuscheria wageneri (K41855) (A) showing conical papillae protruding through a thick layer of secreted material (B). Uniseriate, multicellular, moniliform trichomes also occur upon the labellum (C, D) and these too, penetrate the secreted material (D). Scale bars: A = 500 μm, B = 25 μm; C = 500 μm; D = 25 μm. (E, F) Labellar surface of Rudolfiella aurantiaca (K57061) showing conical papillae (E) with cuticular striations (F). Scale bars: E = 25 μm; F = 10 μm.