condition mean min max Sterile Leaflet 0.07269833333333334 0.0 0.218095 Fertile Leaflet with Sori 0.0 0.0 0.0 Primary Rachis 2.3496099999999998 0.0 7.04883 Petiole 0.0 0.0 0.0 Crozier 0.299706 0.0 0.899118 Rhizome 0.0 0.0 0.0 Root 0.0 0.0 0.0