Bladder ketmia (flower-of-an-hour, venice mallow)

Hibiscus trionum

The plant grows to a height of 20–50 centimetres (7.9–19.7 in), sometimes exceeding 80 centimetres (31 in), and has white or yellow flowers with a purple centre. In the deeply pigmented centre of the flower, the surface features striations, which were previously considered to act as a diffraction grating, creating iridescence.