White avens, Guem canadense Family: Rosaceae Pollen grain morphology: tricolporate, subprolate, tectate Pollen grain size: 21.84 ± 0.88 µm by 19.77 ± 0.33 µm June 12, 2015rosaceae, Uncategorizedcanadense, guem, roseaceae, subprolate, tectate, tricolporate, white avens