Despite their tiny size, many Marasmius species are tough little mushrooms. In dry conditions they simply shrivel up and wait for the next rain. (I recommend watching the british show The Secret Life of Plants to be fascinated by fungi.
Orange Mycena or Lea's Mycena, [Mycena leaiana Mycena leaiana] is a North American species of saprobic fungi. Characterized by bright orange caps and stalks and reddish-orange gill edges, they usually grow in dense clusters on deciduous logs.