Free Paper — The evolution of pollen germination timing in flowering plants: Austrobaileya scandens (Austrobaileyaceae)

Austrobaileya has long served as a model for ancient angio­sperm pol­len struc­ture. Its pol­len ger­min­a­tion is rel­at­ively rapid and requires < 10 % of the pro­gamic phase. Extensive evid­ence dis­cussed in this paper sug­gests pol­len ger­min­a­tion under­went accel­er­a­tion early in angio­sperm history.