Propagation: Is this Clematis seed ready to be harvested?, 1 by Morph

Morph wrote:
I was lucky enough to have several seeds develop on my clematis vine this year. I took this photo to see if anyone might know when I can/should be able to successfully harvest the seeds? I don't want to harvest too soon. But, I'm afraid if I wait too long, they will be blown away during a storm when they've reached maturity. I don't have too many, so I'm anxious to harvest them before they might disappear.

TIA!!