condition mean min max Sterile Leaflet 0.3820053333333333 0.0 0.590745 Fertile Leaflet with Sori 0.0 0.0 0.0 Primary Rachis 2.11945 0.0 3.41512 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