Eastern black raspberry, Rubus occidentalis Family: Rosaceae Pollen grain morphology: tricolpate, subprolate, tectate Pollen grain size: Equatorial: 26.91 µm by 24.96 µm Polar: 26.19 + 0.47 µm by 24.96 + 0.27 µm April 30, 2015rosaceae, Uncategorizedblack raspberry, occidentalis, rosaceae, rubus, subprolate, tectate, tricolpate