condition mean min max Sterile Frond 9.562872666666667 0.0 28.1924 Fertile Frond 7.014909 0.0 20.1657 Young Stem with Root 4.2401333333333335 0.0 10.3287 Mature Stem with Root 7.37556 0.0 21.0518 Root 6.8435999999999995 0.0 20.5308