condition mean min max Sterile Frond 1.45625 0.0 4.36875 Fertile Frond 2.255966 0.0 5.96972 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 7.198483333333334 0.0 20.501 Root 0.8416 0.0 2.5248