A Guest in Potted Plants

Leucocoprinus birnbaumii

Nik found these growing in our potted Prickley Pear Cactus (we grow pots with just about anything we can find! LOL)...The first photo is from June 21 around noon...

This next photo is from 9 pm the same day...

Anyway, upon investigation, he found out that they're actually a common visitor to houseplants, and quite harmless.   :) 

This last photo is from today (June 22) at noon...

By this evening, they'll likely be turned in a concave shape,

and begin to wither away.

It seemed to me this was a strange juxtaposition, 

cacti and fungi growing together like this...