Figure 4
From: Collective excitations of germinating pollen grains at critical points
Butterfly attractor (calculated Poincaré section) for the germinating pollen grains of hyacinth on the transition from germination to the optimal growth temperature showing the cyclicality (\(d = 19\)) in this chaotic system, which indicate that a short-term ~ 19/(4.1 Hz) = 4.64 ± 0.5 s oscillation is the fundamental frequency (\(f_{0} \approx 0.23\) Hz) in the system.
