condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 4.26352 0.0 10.9003 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 1.1637823333333333 0.0 3.09699 Root 0.0 0.0 0.0