[poweramps]

Definitely albomarginata. Other species in Penang like mirabilis, gracilis, ampullaria occur in such small stands that the probability of a hybrid cross is very low. albo x ampullaria has the typical hookeriana like lid, albo x mirabilis has the flattened peristome like mirabilis. The uppers are strongly infundibulate, plus I cannot see any petiole wing down the side of the stem at the leaf-stem junction, thus ruling out albo x gracilis.