condition mean min max Sterile Frond 0.24722566666666668 0.0 0.741677 Fertile Frond 5.3618 0.0 16.0854 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 2.6084133333333335 0.0 5.03826 Root 0.0 0.0 0.0