I planted a number of different types of alliums last fall and these allium cowanii are the first to bloom. Unfortunately the first couple that have opened have a distinctively lazy attitude as you can see by these pictures.
I don't know what causes bulbs to produce weak stems because that is what appears to be going on here. The unopened blooms stand tall and then it is almost like they get top-heavy and topple over. I will have to watch the rest of them to see if it is just the early bloomers or they have all gone prone.