condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.0150174 0.0 0.0450522 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 2.73828 0.0 8.21484 Root 3.01619 0.0 9.04857