condition mean min max Sterile Frond 2.380089 0.0 7.00465 Fertile Frond 0.214674 0.0 0.411344 Young Stem with Root 0.02416043333333333 0.0 0.0724813 Mature Stem with Root 0.140552 0.0 0.272019 Root 0.0 0.0 0.0