condition mean min max Sterile Leaflet 2.159534 0.244107 5.9757 Fertile Leaflet with Sori 0.0 0.0 0.0 Petiole 0.0 0.0 0.0 Crozier 0.15318 0.0 0.45954 Rhizome 0.0 0.0 0.0 Root 0.0 0.0 0.0