Filipendula seeds.

They're all different, and they're all cool.

Here's a few samples:

Photo: Filipendula kamtschatica 4.Pic: Filipendula kamtschatica seed.

Photo: Filipendula rubra 5.Pic: Filipendula rubra seed.

Photo: Filipendula ulmaria 10.Pic: Filipendula ulmaria seed.

Photo: Filipendula vulgaris 2.Pic: Filipendula vulgaris seed.

I first noticed the seeds of our wild one, Filipendula ulmaria. They're cool. So I looked at the seeds of other species - they're cool, too.