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Colour (left), UV (middle) and false colour photograph (right) of UV bull’s eyes on yellow flowers (UV-absorbing parts in bracts). (A) Patersonia umbrosa var. xanthina F.Muell. (stamens, style); (B) Hibbertia aurea Steud. (stamens, basal parts of petals); (C) Tricoryne elatior R.Br. (filmental hairs); (D) Labichea lanceolata Benth. (floral guide); (E) Arctotheca calendula (L.) K.Lewin (basal parts of petals).
