condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.7242926666666667 0.0 1.30422 Young Stem with Root 1.8313533333333334 0.0 4.43016 Mature Stem with Root 3.30489 0.0 7.16653 Root 0.0 0.0 0.0