I was wondering if there is an easy way to collect
black-eyed-susan seeds.

I seem to remember collecting them the same way but
found a way to separate them fairly easily. Put all
the stuff in a small square or round cake pan. Take
a playing card or similar thin, stiff-but-flexible
piece of cardboard and, tilting the pan a little,
use the card to lift a little of the material at a
time and let it fall back into the bigger pile. The
seeds, being heavier than the 'chaff', will fall to
the lower part of the pan, the 'chaff' will remain at
the top.

Tracey
who once saw someone do this with other material
because, of course, she would never have done it
herself grin