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 June 10, 2015Violaceaealpine yellow violet, biflora, indistinct pore, oblate, spheroidal, tricolporate, twoflower violet, Viola, yellow wood violet