it couldn't have been ice. there was a bit of frost here and there, but it was definitely a growth of some sort throughout the forest.
It's definitely a form of ice. This stuff comes up in this forum regularly, especially after a spell of freezing weather such as we are currently experiencing. All you have to do is put some of it in your hand and watch it melt.
Photo of a branch that Douglas brought in to the office taken 5 minutes ago. He said the ice crystals were twice as long when he found it.