Many species of trigger plants are endemic to the south west of Western Australia. Several species of these fascinating and beautiful flowers can be found within Warwick Bushland These einclud the Book Triggerplant, Pink Fountain Triggerplant, Fleshy-Leaved Triggerplant, Common Butterfly Triggerplant, Matted Triggerplant and Cow Kicks.
Trigger plants have a unique pollination method. Each flower has a spring loaded, touch sensitive column hidden behind the petals that contains both the male and female parts of the flower (anther and stigma). When an insect lands on the flower the column flicks up like a hammer hitting the insect on the back. This action either deposits or collects pollen from the insect depending on the life cycle of the plant. The plants avoid self-pollination due to the delayed development of the stigma (female part).
Cow Kicks is the largest trigger plant to flower in Warwick. The images to the right show flowers where the column is open (top), has sprung shut (middle), and a trapped a fly (bottom). This fly will eventually escape taking pollen from the flower with it. Most insects do not get trapped by these flowers.