Your orange tiger is the species, L. lancifolium (aka L. tigrinum). It naturally has "bulbils" on the stem. The pink tiger is a hybrid of the species with other genes introduced. Simply put, they are not the same lily! That said, there are some other hybrids out there that do get bulbils on the stem. The bulbils are like miniature bulbs and can be planted when they are ready to come loose from the stem.
Some people refer to them as "seeds" on the stem but that is an incorrect description.
