condition mean min max Sterile Frond 0.239522 0.0 0.718566 Fertile Frond 8.864533333333332 0.0 26.5936 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 2.578533333333333 0.0 7.7356 Root 0.0 0.0 0.0