condition mean min max Sterile Leaflet 0.774424 0.303702 1.39251 Fertile Leaflet with Sori 4.858093333333333 0.0 13.4051 Primary Rachis 0.0 0.0 0.0 Secondary Rachis 0.0 0.0 0.0 Petiole 0.0 0.0 0.0 Crozier 0.0 0.0 0.0 Root 0.0 0.0 0.0