Nepenthes can be sexed long before flowers are open with pretty good accuracy
by the shape of the inflorescence. Male inflor. will look like an inverted
cone tapering to a point, females are very cylindrical. Also males may
produce multiple inflorescences on one shoot, while this is more rare in
females. Please forgive any lack of protocol on the net as this is my first
letter out.
Good Growing,
Cliff