<a href="https://en.wikipedia.org/wiki/Geastraceae" class="extiw" title="w:Geastraceae">Earthstar</a> fungus (<i>Geastrum saccatum</i>) found in Badangi Reserve, <a href="https://en.wikipedia.org/wiki/Wollstonecraft,_New_South_Wales" class="extiw" title="w:Wollstonecraft, New South Wales">Wollstonecraft</a>. The plant growing over the right hand edge of the fungus is <a href="https://en.wikipedia.org/wiki/Commelina" class="extiw" title="w:Commelina">Commelina cyanea</a> which is common in the area. The species is either G. triplex (also known as G. indicum in Australia) or G. saccatum. The lack of a saucer and the size suggests saccatum - triplex is usually larger, and often has a saucer between the ball and the arms.
<a href="//commons.wikimedia.org/wiki/User:WikiWookie" title="User:WikiWookie">Mike Young</a>
CC BY 2.5
<span class="int-own-work" lang="en">Own work</span>