By en:User:Qwfp (original); Pbroks13 (talk) (redraw) (en:Image:Fisher iris versicolor sepalwidth.png) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
500px-Fisher_iris_versicolor_sepalwidth
By en:User:Qwfp (original); Pbroks13 (talk) (redraw) (en:Image:Fisher iris versicolor sepalwidth.png) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons