condition mean min max Sterile Frond 9.341366666666667 0.0 28.0241 Fertile Frond 13.085700000000001 0.0 39.2571 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 0.5157066666666666 0.0 1.54712 Root 0.0 0.0 0.0