condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.0 0.0 0.0 Young Stem with Root 0.332447 0.0 0.689425 Mature Stem with Root 0.296281 0.0 0.888843 Root 5.933556666666667 0.0 14.5137