Clustered pine bonnet is a fungus with a heavy pungent odor of chlorine.
Grows mainly on dead trunks of pine trees.
Pretty rare.
Dutch name : Bundelchloormycena
German name : Viersporiger Nitrat-Helmling (auch Büscheliger Nitrathelmling genannt)
Latin name : Mycena stipata (previous Mycena alcalina)