Common meadow violet, Viola sororia Family: Violaceae Pollen grain morphology: tricolporate, oblate spheroidal Pollen grain size: 48.36 ± 1.00 µm by 32.92 ± 1.33 µm June 12, 2015Violaceaecommon blue violet, common meadow violet, oblate spheroidal, sororia, tricolporate, Viola, Violaceae