Adrian Davies / Black-eyed susan (Rudbeckia hirta) illuminated using different waveforms of light. Visible light (left), reflected UV light (centre), UV light as seen by bees (right). Studio environment, composite.

Adrian Davies / Black eyed susan (Rudbeckia hirta) cultivated form, in flower.

Adrian Davies / Black eyed susan (Rudbeckia hirta) cultivated form, in flower, reflected ultraviolet light.