condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 2.820456666666667 0.0 8.46137 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 0.07891966666666667 0.0 0.236759 Root 0.45135400000000003 0.0 0.769005