condition mean min max Sterile Frond 0.0 0.0 0.0 Fertile Frond 0.0 0.0 0.0 Young Stem with Root 0.0 0.0 0.0 Mature Stem with Root 1.8159966666666667 0.0 2.85124 Root 2.95984 0.0 8.87952