Although it does appear that some black, skeletal plant is blooming frost, it's actually just a fresh winter storm caught on a long dead cap of Queen Anne's Lace, or Wild Carrot (Daucus carota).

The cool hue comes in part from the slight shadow of the overcast sky above, and from the extra sensitivity of Fuji film to blue. It is important to remember, for those new to nature photography, that shadows and anything caught therein, when using daylight film, will take on a blue hue in the slide or print.