Stinkhorn (Phallaceae)
The fruiting body of a stinkhorn fungus emerges from the ground as an egg-like structure. It then splits open, revealing a stalk with a number of coloured arms.
Stinkhorn fungi produce a smelly mucus mass full of spores at the base of their arms. Flies feed on the stinking mucus and in so doing help to spread the spores. Original public domain image from Flickr