Flowers in the Frost

I was heading up the garden today to go to the office, when I spotted this little flower hiding in the frost next to the path. Most things in the garden are pretty much in shutdown for the winter, but a handful of these have opened up early and are braving the frost to cheer us up in the cold.

Not sure what's going to pollinate them though, but they've survived for years so far, and it's nice to see them.