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(A–C) Labellum of Xylobium latilabium (K6811) showing distribution (A) and detail (B, C) of uniseriate, moniliform trichomes and obpyriform papillae. Scale bars: A = 500 μm; B = 100 μm; C = 50 μm. (D–F) Labellum of Xylobium scabrilingue (K31551) showing verrucae (D, E) with well-defined cells at their tips (F). Scale bars: D = 500 μm; E = 100 μm; F = 25 μm.
