P. rotundifolia looks like it grows naturally as a vine in the Brazilian forests according to the database photos. May be a xeriscapic plant that likes humidity rather than sitting in water. Forest floors tend to be spongy with good drainage. Succulents that tolerate humidity are easier to grow in hot, hotter and steamy and steamier conditions like I've had this summer. Those with an Alpine background have not liked it here this summer. I'll have to be on the lookout to acquire this one, I think.
