About a month ago, I purchased a small clump of mud labeled U. resupinata on Ebay. This plant has been growing like crazy. For those who like to see the bladders, I would recommend this plant. While it is an affixed aquatic, it seems to grow primarily between the surface of the water and the substrate which is only about a half inch. Come Spring, I am going to let the water recede and raise the temps to make the plant flower.