condition mean min max Sterile Frond 8.202583333333333 0.0 20.5096 Fertile Frond 0.6805000333333333 0.0329234 1.94223 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 0.013388700000000002 0.0 0.0401661 Root 0.0 0.0 0.0