What is this plant growing wild in my yard? It has these beautiful long white flowers which stay like this even during the night. Doesn't have any fragrance, not that I can detect. It seems to like direct sunlight outside. I know this coz when I brought it inside after replanting it in a container, it didn't like it. So i moved it back outside where is started do well again. No seeds yet, or maybe I don't know how to spot them. I like the looks of this plant. So I wish to propagate it. But what is it called?