condition mean min max Sterile Leaflet 2.319631 0.0 6.39245 Fertile Leaflet with Sori 0.2896535333333333 0.0 0.776298 Primary Rachis 0.33700813333333335 0.0 0.936933 Petiole 0.0 0.0 0.0 Crozier 0.0 0.0 0.0 Rhizome 0.0 0.0 0.0 Root 0.0 0.0 0.0