condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.375303 0.0 0.897499 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 9.11673 4.5775 16.786 Root 1.6957876666666667 0.0 4.87526