Trap: In this plant the stigma becomes receptive first, then the anthers mature afterwards. A means has been evolved by which cross-pollination is encouraged: First – flowers upright, insects push way past downward facing hairs which then prevent their exit. Stigma receptive. Second – flowers pendant, pollen released disting insects which then escape after hairs shed. Stigma withered. Third – insects can make their way to flowers in the upright position with receptive stigmas pollinating as they go down to be trapped again.