condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.443548 0.0 1.13677 Young Stem with Root 0.44776 0.0 1.34328 Mature Stem with Root 7.640173333333333 0.0 21.0706 Root 2.287846666666667 0.0 4.19915