Common hawthorn, Crataegus monogyna Family: Rosaceae Pollen grain morphology: spheroidal, intectate, psilate, tricolpate Pollen grain size: Equatorial: 58.88 µm by 53.7 µm Polar: 58.28 µm by 58.25 µm April 30, 2015rosaceae, Uncategorizedcrataegus, hawthorne, hawthron, intectate, monogyna, psilate, rosaceae, spheroidal, tricolpate