I managed to get out today for a walk along Tolmer Creek in Litchfield National Park. This tiny (8 mm) flower is from Stylidium semipartitum, a semi-carnivorous plant that catches small flying insects on its sticky hairs in much the same way as sundews. The most interesting feature of stylidiums, however, is its method of pollination. In the second photo you can see its staminate structure below and behind the flower. It contains a large load of pollen. When a small insect visits for a feed of nectar it triggers the stamen to snap over onto the insect's body, dumping its load of pollen (hence its common name of trigger plant). The insect then flies off to feed at the next flower, spreading the pollen all over it and ultimately fertilising its ovules.
Stylidium semipartitum, trigger plant, the first in its 'cocked' position and the second after a small flying insect had stopped by and triggered the stamen to dump its load of pollen on it.