cholchicine is mucho toxic - I don't think it is carcinogenic, used as medicine in the treatment of gout
in very dilute form that is
as far as what is does, and this from memory - it doubles up the chromosomes or some such thing
it's been used in plant breeding for quite some time
on the clone issue and toxic amounts - not planning on trying it anytime soon
but it was interesting, in what you might get for a clone that was treated with it