condition mean min max Sterile Leaflet 0.28684333333333334 0.0 0.86053 Fertile Leaflet with Sori 0.0 0.0 0.0 Primary Rachis 1.884827 0.496573 4.54011 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