Flowers that grow traps
I have never seen this happen before myself. The phenomenon is referred to as false vivapary.
This is apparently not a completely understood topic and is believed to be caused by a hormonal mistake.1 If this happens to your plant, we recommend waiting till the stalk looks like it’s stopped growing, then clip it and root the new cuttings in the ground. With luck they’ll grow into nice big healthy plants.
Photo courtesy of Barry Rice who has an interesting article on this topic.