condition mean min max Sterile Leaflet 0.8370733333333332 0.0 2.51122 Fertile Leaflet with Sori 0.0 0.0 0.0 Primary Rachis 1.8559166666666667 0.0 5.56775 Petiole 0.0 0.0 0.0 Crozier 0.0 0.0 0.0 Rhizome 0.0 0.0 0.0 Root 0.0 0.0 0.0