condition mean min max Sterile Leaflet 0.0 0.0 0.0 Fertile Leaflet with Sori 20.255466666666667 11.1709 34.3962 Primary Rachis 0.103592 0.0 0.310776 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