I purchased this in Oct.'16 from an ebay vendor. It arrived mounted on a piece of tree fern with another plant loose in the package. I potted the loose on in spag. with coconut fiber around the outside in a 2' hydro pot. in Nov.the one on the tree fern developed this and promptly died. The other one has been fine until today. I have never seen this before and don't know what it is. Can anyone help? I have a cool to intermediate greenhouse, 50-55 nights and 65-70 days if the sun is shining. I have low light until the sun gets up above the trees on the hill behind my house in mid Jan. I have 80-90% humidity and good air circulation. I am attempting to upload two pictures, last week and today. Am not sure that I am doing this right. I can't see the pictures in the post right now but I did select them and they were listed in the selection window. Here goes!