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
Yellow wood violet, Viola biflora
Family: Violaceae Pollen grain morphology: tricolporate, spheroidal, oblate, indistinct pore Pollen grain size: 35.62 ± 0.76 µm by 32.76 ± 0.25 µm
Field Pansy, Viola bicolor
Family: Violaceae Pollen Grain Morphology: Stephanocolpate Pollen Grain Size: 58.3 + 4 µm by 55.1 + 2 µm