condition mean min max Sterile Leaflet 0.18956633333333334 0.0 0.359039 Fertile Leaflet with Sori 6.44396 4.66693 7.89995 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