The "Smarty Pants" red flowers are beautiful, but in my opinion, it is the gorgeous leaves that are the star of the plant. I wouldn't call them "black" but in the sun they glow a striking light green to a wonderful dark green. Unlike many dahlias, the leaves near the bottom of the plant keep their good looks well into late September (Zone 5) and early October. In mass, Smarty Pants puts on quite a show.