condition mean min max Sterile Leaflet 2.0971613333333337 0.215587 5.26674 Fertile Leaflet with Sori 2.306693666666667 0.708961 3.28772 Primary Rachis 0.063013 0.0 0.189039 Secondary Rachis 2.2081 0.0 4.00187 Petiole 0.029959233333333335 0.0 0.0898777 Crozier 0.0 0.0 0.0 Root 0.0 0.0 0.0