condition mean min max Sterile Frond 20.072503333333334 8.23811 37.4498 Fertile Frond 18.6084 3.60331 45.8488 Young Stem with Root 0.3730466666666667 0.0 1.11914 Mature Stem with Root 0.608348 0.0 1.51595 Root 0.0 0.0 0.0