Stinking onions

White flowers, each petal with a thin, green stripe down the centre, 4-10 per flower head. Once open they tend to hang down, so you need to lift them to see the beauty of each flower. The flower stems are unusual in being triangular in section. Leaves are keeled, green, and hairless, and the whole plant smells strongly of onions or garlic. 
Another with the Jupiter 8.