Fig. 1.

Flower features of Lepanthes glicensteinii and pollination by male Bradysia floribunda flies. (A) Front view of flower. (B) Fly on top of flower; note closed gonostili at the tip of his abdomen. (C) The same fly with gonostili wide open bending his abdomen under the blades of the labellum. (D, E) Fly probing for the appendix, located under the labellum blades, lateral view. Scale bar = 2 mm. (F) Fly after securing the appendix with his gonostili; this flower is lying on its side against the leaf, with the column pointing toward the photographer. (G) The same fly pivoting around with his gonostili still securing the appendix. (H) Fly after completing the pivoting manoeuvre, assuming the ‘tail-to-tail’ position. (I) Fly ‘tail-to-tail’ with the flower; note column pressed against the dorsal part of his abdomen. (J) Fly ‘tail-to-tail’ with flower, with photographer's thumb for scale. (K) Fly probing for the appendix under the blades of the labellum, with pollinaria (bright yellow) attached to the ventral part of his abdomen. (L) Fly visiting flower with pollinaria attached to the dorsal part of his abdomen. Abbreviations: a, appendix; c, column; l, labellum blade; p, petal.