Plants have a varity of methods they imploy to spread out their
seed. CP are generally mundane when it comes to this. When the
ovaries have dried (and this goes for most plants, BTW) they
split and the seed falls out. Not much else to it. Just be
there as the ovary starts to turn brown or a little before hand
for Sarracenia is ok, or the seed will just sow it's self in your
pots or whatever and come up. The seed takes different lengthes
of time to mature for the different plants. Drosera and relatives
are quick, Sarracenia and relatives slower and can be gathered in
late summer/fall.
Dave E