Or is it even one ? I am pretty certain its an Aroid , it just has that look to it . Leaf is very much like a Syngonium . It could be a climber , sends out long runners . Not seen a flower yet on it , but maybe next year when it has established on a tree . Source said it could have come from PNG , as he had some nice Raphidophora spp. and Alocasia that are from there from same supplier . It reminds me of Cercestis [was Rhektophyllum mirabile , but this one has no white patches .. will get a better picture later .. this one is a leaf on one of the cuttings I took today .