I just recently acquired a few house plants after my mother in law past away and I don't want to kill them. I have what I have always known as a christmas cactus and something that looks like some kind of an elephant ear really dark green heart shaped on top but pointed on bottom glossy leaves with lighter green veins/scalloped around the edge and purpleish red on the back. I have only had it 2 weeks andsome of the leaves are turning yellow/brown and rolling up on the side. I'm killing it are'nt I. If someone could please tell me what it is and how to take care of these plants I would be ever so greatful. Thnks And Happy New Year..