I suppose by now that nearly everyone realizes that the symbol for love, the so-called heart, which will be in abundance in a week, has nothing to do with the human heart or for that matter any mammalian heart. Various anthropologists had sometimes said it was the male genitalia upside down or the female buttocks. It is in fact the form of the seed of the silphium plant which for hundreds of years was the economic mainstay for certain parts of northern Africa. It is in fact a birth control drug and now thought to be extinct. The seed and the plant were immortalized on their coins the ones with the plant in silver being quite expensive. Here is a small fraction from my collection showing a leaf and the seed. Note the shape. This is Sear 6250, Cyrene, circa early 5th century B.C., silver. It is quite rare.