This listing is for a Nepenthes (singalana x diabolica) from Borneo Exotics, clone 3900. It is currently grown in highland conditions in an ultramafic mix. Photos are representative of the plants for sale.
This cross was originally made before N. diabolica was defined as a unique species, so while BE 3900 may be named as (singalana x hamata), it was in fact created using an "RHH" or what is today known as N. diabolica.
