Yellow sweet clover, Melilotus officinalis Family: Fabaceae Pollen grain morphology: tricolporate, tectate Pollen grain size: 24.47 ± 0.58 µm by 18.48 ± 0.42 µm June 15, 2015Fabaceae, UncategorizedFabaceae, melilotus, officionalis, tectate, tricolporate, yellow sweet clover