condition mean min max Sterile Leaflet 3.247792 0.0 9.41413 Fertile Leaflet with Sori 2.3403133333333335 0.0 6.73701 Primary Rachis 0.0 0.0 0.0 Secondary Rachis 0.0 0.0 0.0 Petiole 0.0 0.0 0.0 Crozier 0.0 0.0 0.0 Root 0.0 0.0 0.0