I received some lilies from a friend a couple of years ago she called turban lily. When they bloomed I took the flower to a local nursery who told me it was davidii. I looked up the flower & that certainly looks right to me. But I happened to look it up again recently & noted that it is supposed to be 4' tall. All mine are closer to 6'. My friend has some that must be closer to 7'.

Is there something else this could be? It has fairly heavy coarse foliage & heavy stems, forms the bulbils all along the stems.

Thanks for any help!