condition mean min max Sterile Leaflet 0.13625966666666667 0.0 0.408779 Fertile Leaflet with Sori 0.0 0.0 0.0 Primary Rachis 1.8621903333333334 0.0 4.79289 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