condition mean min max Sterile Leaflet 1.177133 0.0 2.83556 Fertile Leaflet with Sori 3.126873333333333 2.67895 3.86788 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