Japanese Barberry (Berberis thunbergii) Family: Berberidaceae Pollen grain morphology: Spheroidal, spiraperturate Pollen grain size (polar view): 40 + 0.1 µm by 38.6 + 0.2 µm Flower of Japanese Barberry (Berberis thunbergii) October 16, 2014Berberidaceae, Uncategorized