I'd used that website to help w/scabiosa seeds -- luckily not for calendula because I think their photo is wrong. It would make sense for the dark, smaller, skinny squiggly things to be the calendula seed as those are the most protected part.
I would hate to think I tossed out 95pct of the seeds in that packet !!!! If I can find more seed heads w/the chaff I will try planting both separately.
That said --- I just read this discussion (sound familiar?)
https://forum.gardenersworld.c...
and this fellow says/shows the entire dried head = seeds (skip to 2 :30)
http://kitchenhomegardener.in/...
(maybe I tossed too early ... and kept the smaller seeds(I hope) at that
)
