It is funny how close and closer a flower, such as a Dahlia, can take on abstract appearance so the original flower shape becomes forgotten. So in this Dahlia I see distant mountains, or a mouth with teeth, or a deepening well, and so on, and patterns galore. Or, maybe that is just my visual imagination run riot! One needs to do something to entertain oneself during longish photo exposures.
Exposure data (both): Nikon D850, 150mm f/2.8 Irix “Dragonfly” telephoto macro, 50mm extension tube, f/22 at ISO 64, tripod mounted; 20 seconds exposure duration (above) and 15 seconds exposure duration (below). Both images were lit using controlled sunlight (from the left side) via window shades.