condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.0 0.0 0.0 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 2.9791166666666666 0.0 8.93735 Root 2.30964 0.0 6.92892