Thanks!
I'll do that with L auratum seedlings.
I also cut off the flowers of L Sunny Martinique, as you told me to do, after I could check the color of the flowers corresponded to that hybrid.
I think that maybe they are L lancifolium but the flowers grew distorted due to the cool weather.
You can see in the pic they didn't even develop stamens or pistils.
(Where I bought the bulbs they do not have any other that resembles this one)