condition mean min max Sterile Leaflet 3.90306 0.0 8.62771 Fertile Leaflet with Sori 0.10681666666666667 0.0 0.195934 Primary Rachis 7.204315 0.882355 13.8192 Petiole 0.355243 0.0 0.663987 Crozier 0.0 0.0 0.0 Rhizome 0.011245999999999999 0.0 0.033738 Root 0.208494 0.108797 0.330118