Labellum and column movement in Levenhookia. Black arrow = labellum hooded over column; white arrow = labellum ‘triggered’ to release column; yellow arrow = labellum repositioned following column release; blue arrow = column position immediately following release from labellum A L. stipitata (unvouchered, Augusta area, Western Australia) B L. aestiva (J.A. Wege 2090) C–E L. leptantha (J.A. Wege 2063), with labellum enclosing the column (C), triggered to release the column which moves to the opposite side of the flower (D) and subsequently repositioned (E) with the stigmatic lobes developed F L. aestiva (J.A. Wege 2090), labellum triggered with column momentum stopped by the sheath at the base of the corolla lobes G, H L. pauciflora (at J.A. Wege 1071 & C. Wilkins): note the unusual, distally-angled column and brush-tipped labellum I L. murfetii (J.A. Wege 2060): note the dorsal position of the labellum; J, K L. dubia, with the labellum opening (but not otherwise moving) to release the column (K). Photos by R.W. Davis (A, B) and J.A. Wege (C–K).