condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.012675066666666667 0.0 0.0380252 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 2.8238586666666667 0.0 8.1745 Root 1.99969 0.0 5.99907