I shot these pictures on November 7th when we had our first real frost (which was followed by multiple days in the 70's, and now we're facing snow and temps in the teens, all within a month!). That's Kentucky for you!
Anyway, the white you see at the base of these stalky weeds is ice crystals. I can't formally name this phenomenon, but I've been happy to observe it for many years when we have the first cold of the season. I think that the moisture in these stalks is forced out by the contraction of freezing, and it forms into thin crystals along the stalk.
I like to think of them as pendants put up by fairies to celebrate the coming of winter!
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