condition mean min max Sterile Leaflet 7.6933 0.0 23.0799 Fertile Leaflet with Sori 0.28288566666666665 0.0 0.848657 Primary Rachis 0.15121066666666666 0.0 0.453632 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