Are there any flowers with naturally black petals?

The Pilea Repens or Black-leaf Panamiga, a native of the West Indies, is a small plant that has nearly black foliage. Other plants that have leaves with dark black, maroon, or deep blue colored foliage include the Burgundy Hearts Redbud, the Diablo Ninebark, the Black Beauty Sambucus, the Voodoo Sedum, the Black Beauty Coral Bells, and the Black Scallop Ajuga.