Eastern daisy fleabane, Erigeron annuus Family: Asteracae Pollen grain morphology: echinate, tricolporate Pollen grain size: 17.95 + 0.76 µm by 16.78 + 0.92 µm April 28, 2015Asteraceae, Uncategorizedasteracae, daisy fleabane, echinate, erigeron, tricolpate