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Bulbophyllum orientale – SEM. (A, B) Basal part of the labellum with copious, amorphous secretion. (C) Palisade-like cells of the labellar groove coated with secretion. (D) Palisade-like cells with finely striate cuticle. Scale bars = 500 μm, 100 μm, 20 μm and 20 μm, respectively
