condition mean min max Sterile Frond 3.2034266666666666 0.0 9.61028 Fertile Frond 1.3842433333333333 0.0 4.15273 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 0.0 0.0 0.0 Root 0.0 0.0 0.0