At the very beginning of the movie when the scientist goes into the deepest African jungle to get the plant there is a ceremony taking place. Everyone is wearing traditional African garb (the kind you'd see in movies) like bone necklaces and feathery stuff except for the girl who is about to be sacrificed. She is in a dress you can find at Macy's, and definitely not the jungle.
It is not explained how Dr. Moran was able to smuggle a huge carnivorous plant from South America past British customs and then have it delivered to his estate in England without attracting the attention of the authorities.