Black Magic Striking Blooms

About a month ago I moved several Black Magic Elephant Ear plants to the front patio and they seem to like it. They present quite a nice display and this week one produced two flowers at the same time. These bright yellow flowers are up to a foot long sitting on top of the a round green base. The flowers only last a couple of days but while they are blooming, they are beautiful. I haven't ever seen these flowers attract birds or bees and I haven't detected any fragrance.