The main plant in these photos (the plant with the quilted looking leaves) is an Anthurium luxurians. But the plant growing with it, with the kind of irregularly shaped leaves, I think is a fern. It has spores on the underside of some of the larger leaves. But what type is it? It came apparently as a freeloader in the pot with the anthurium. because I have never had this plant before. I need to know what it is because if its going to get really big, I need to try to separate these 2 plants pretty soon. Any help appreciated!