I don't know where that plant came from but it is greener
than your average Ceph, has more waves in the front of the pitcher
too. It's probably a plant someone had in tissue culture and
when they deflasked it, it grew very large quickly and maybe
someone they passed it onto gave it that name. I've seen normal
Cephalotus with two inch long traps or longer (I wish mine would
do that!) so I don't think the "giant" is really much different.
Cephalotus seems to be much more homogenus (sp?) that say the
VFT so any variation is something to look for.
Dave Evans