The post Arctic Ice Flowers showed us one of the strange things weather conditions can do to water. Here's another: frost flowers.
A frost flower is created on autumn or early winter mornings when ice in extremely thin layers is pushed out from the stems of plants or occasionally wood. This extrusion creates wonderful patterns which curl and fold into gorgeous frozen petioles giving this phenomenon both its name and its appearance.
See many more of them at Kuriositas. Link
(Image credit: Flickr user Mark Adams)