Ox tongue lilly--day of the triffids?

This is the amazing Ox Tongue Lilly, firstly the flower pushes up through the earth and will grow a short stem, then after the flower has finished, two leaves appear, growing opposite each other which look like a long Ox tongue. I had almost forgotten that I planted them in their new sunny position. They had been growing for years under some shrubs, and of course they will not send up a flower without any sunshine. I planted about eight of them, all in the same spot last year, so there may be some others lurking just beneath the surface.