Identification: Strange yellow mushrooms

In the pot in which my yellow hibiscus grows several days ago strange yellow phallic-looking mushrooms -- dozens of them -- have started popping up. They grow rapidly daily, eventually with umbrella-like caps. I would love to know what they are. I hope to attach photos, but this is my first time, so I'll attempt to do so. Any information much appreciated.

 

See this thread stickied at the top of the Fungus ID forum

 

I haven't seen any responses but was looking thru other links and saw a similiar photo.... try lookin gup Lepiota lutea. not sure? but maybe?

 

dan posted a link to the page that describes your mushroom --> Leucocoprinus birnbaumii.

 

Leucocoprinus birnbaumii / flos-sulphuris.

Nico