Black Flower

black flower exists or not?

Everyone knows the existence of a black flower? If this is not the flower is at least considered as black?

Here are some flowering plants black: black flowers: Aquilegia 'Black Barlow', 'William Guinness' (Columbine) Tulipa Queen 'of Night' (Tulip) Alcea rosea 'Nigra', 'Black Beauty', 'Night Watchman' (hollyhock) Study Iris' Hello Darkness in Black ',' ',' Paint it Black, "" superstition, "I. chrysographes Clematis' Romantika 'Dahlia' barbatus nigrescens Arabian Night 'Dianthus' Tuxedo Black', 'King of Starling Hemerocallis' Black' '(daylily) Ace Nemophila menziesii 'Pennie Black Scabiosa' Atropurpurea 'picnic "," Black Mourning Bride' (pincushion flower) Centaurea Black Ball ' ',' Black Boy '(cornflower) Helleborus' Little Black ',' Black Beauty '(Lenten Rose) Viola cornuta' Bowles Viola Black ',' Molly Anderson ',' Black Jack ',' Black Magic 'Thinking' Coal Black ',' Black Moon ', 'Black Prince', 'Black Star', 'Black and White', 'Black Panther' (thought) Hyacinth 'Midnight Mystique 'Paeoniflorum Papaver' Black Peony '(Peony Poppy) Antirrhinum majus' Black Prince '(snapdragon) Tropaeolum minus' Black Capucine " 'Black Velvet' (Nasturtium) Black Foliage: planiscapus Ophiopogon 'Nigrescens' (black mondo grass) - for foliage Colocasia esculenta' Black Magic '(elephant ears) - for foliage) Ipomoea batatas' Blackie '(Sweet potato vine) - for foliage Phyllostachys nigra' Black Bamboo Phormium 'Platt's Black', 'Dark Delight' (Flax New Zealand) - for the trees Now I do not know if a botanist technically classify these flower "black", they may be a very dark purple, but what do they look black.