This one grew on my previous tank (Dark Land for those that saw the Journal) on a rock and i didn't put it there Two possibilities: 1) came with the rock, it's a non aquatic plant but grew underwater and is still growing slowly (i changed it to another aquarium); 2) came with another plants and went with the flow to that rock (I bought some plants from Vasteq and that could be a possibility). It's an epiphytic plant. I compared with Bolbitis mini... but I don't think so! Thank you very much. Pedro.