condition mean min max Sterile Leaflet 0.0813232 0.0 0.154109 Fertile Leaflet with Sori 5.17774 3.08919 6.4831 Primary Rachis 0.0 0.0 0.0 Secondary Rachis 0.23091696666666667 0.0 0.599814 Petiole 0.023519333333333333 0.0 0.070558 Crozier 0.0 0.0 0.0 Root 0.0 0.0 0.0