condition mean min max Sterile Leaflet 0.37753 0.0 1.13259 Fertile Leaflet with Sori 3.94626 3.82164 4.14695 Primary Rachis 0.0 0.0 0.0 Secondary Rachis 0.0 0.0 0.0 Petiole 0.138544 0.0 0.415632 Crozier 0.0 0.0 0.0 Root 0.0 0.0 0.0