Dear Folks just as extra info: There seems to be diploid and triploid hybrids around of H non-scripta and hispanica. I am not sure yet but the triploid seems to have broader leaves and bigger flowers ( Like Excelsior!) So being triploid it is no surprize that is does not seed around. Actually I think also the diploid hybrid is fully sterile .However both increase very fast by bulbs. They might also increase by apomictic seed?. So what I see around in gardens or semi wild is mostly the hybrid .Moreover a good difference between them is H noncripta has yellow-white anhters and H hispanica purple anthers, the hybrid has lightly lilac anthers. So out in the garden and check those anthers! Ben J.M. zonneveld