Red backed foliage

I have recently developed a love for leaves with red backs.... In the shady garden I thought that a lot of plants would not flower and began to look or more interesting foliage,and that is where it all started. I picked up one of these little plants at the orchid show last year, and have already subdivided them once. I volunteered at the local markets on Saturday and found a few plants I just had to have. The one was this variegated leaf Calathea. I have admired the Calathea with red undersides, and on looking it up discovered that the first plant is also a Calathea, or peacock plant. Some plants like this cordeline start off pink and then turn a darker shade as they age. This one has even more color distinction between the old and new leaves. I think my favorite foliage plant though has to be this grey leaved rex begonia. From one little slip I have subdivided it many t...