with pollinating butterfly. Photo taken by Del Wiens.

Close-up of flower taken by Del Wiens July 1972.

Anthesis in this species is explosive. At the slightest touch, the corolla lobes snap open and the filaments coil up rapidly. This causes the anthers and enclosed pollen to be flung as far as 20 cm. The mechanism is an evolutionary adaptation to bird pollination. Photo from Visser (1981).