Black Elderberry, Sambucus nigra
Family: Adoxaceae Pollen grain morphology: verrucate, spheroidal, tricolporate Pollen grain size: 30.18 ± 0.82 µm by 25.19 ± 1.08 µm
Guelder rose, Viburnum opulus
Family: Adoxaceae Pollen grain morphology: spheroidal, tricolpate, reticulate Pollen grain size: 22.77 + 1.75 µm by 20.25 + 0.10 µm
Red elderberry, Sambucus racemosa
Family: Adoxaceae Pollen grain morphology: spheroidal, long furrows, verrucate membranes, reticulate, semitectate Pollen grain size: Equatorial: 18.65 + 0.68 µm by 17.45 + 0.60 µm Polar:18.15 µm by 18.1 µm