I have a special tool to remove dandelions. I love this thing. Makes me feel like I am all organic-y in my lawn care (which I am not...we'll talk about that later).
 
Yet this -- gets to stay.  
 
Its a portulaca. I love portulaca's and have them planted in various locations around the gardens.
But technically, isn't this just a yellow flower growing in a sidewalk crack.
Like a dandelion is simply a yellow flower?
 
 
Hmm...