condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 3.07747 0.0 9.23241 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 7.63324 1.6185 12.4393 Root 1.628643 0.031246 4.66291