What species is this lily?
But then a very small cutting from its rhizome... That way it stays very small for a few years depending on fertilization and light cycle... This actually goes for any lily sp. with a Marliac or Tuberosa rhizome. Cut off a small young plantlet from it's rhizome and plant it in a tank with a clay cone added.
But if you are interested in this specific sp. It's this one sold at Ebay from a German nursery.
And this, when it flowered indoors. I'm still in love...