Australian competitive compound leaves evergreen tree fast-growing fast-spreading flora flower spikes flowers invasive native native flora native plant ornamental plant prolific prolific seeder Queensland native red spikes schefflera actinophylla spikes terminal inflorescence tree umbrella tree unique flowers adopting color of surroundings adopting colour of surroundings alert back ridge blending in blending with the environment Camouflage color changing colour changing fast moving leathery looking lizard ridge ridge spikes scales 2015 christmas decoration gold red