St. John’s Wort, Hypericum perforatum
Family: Hypericaeae Pollen grain morphology: tricolporate, prolate, semitectate Pollen grain size: 20.49 µm by 19.76 µm
Snapdragon, Antirrhinum majus
Family: Plantaginaceae Pollen grain morphology: tricolporate, prolate, sheroidal, tectate Pollen grain size: 22.46 ± 0.66 µm by 21.44 ± 0.09 µm
Serviceberry, Amelanchier spp.
Family: Rosaceae Pollen grain morphology: tricolporate, tectate, subprolate Pollen grain size: Equatorial: 30.21± 1.19 µm by 25.85 ± 1.19 µm Polar: 31.38 ± 1.01 µm by 28.84 ± 1.78 µm
Mossy stonecrop, Sedum acre
Family: Crassulaceae Pollen grain morphology: subprolate, tricolporate, tectate Pollen grain size:23.05 ± 0.64 µm by 20.58 ± 1.21 µm
Scarlet pimpernel, Anagallis arvensis
Family: Primulaceae Pollen grain morphology: tricolporate, striate Pollen grain size: 22.62 ± 2.01 µm by 20.97 ± 1.09 µm
Virginia raspberry, Rubus odoratus
Family: Roseaceae Pollen grain morphology: tricolporate, striate Pollen grain size: 25.91 µm by 25.67 µm
Redbud, Cercis canadensis
Family: Fabaceae Pollen grain morphology: tricolporate, prolate, verrucate Pollen grain size: Polar: 24.29 ± 0.215 µm by 20.14 ± 0.84 µm Equatorial: 23.06 µm by 21.81 µm
Oriental poppy, Papaver orientale
Family: Papaveraceae Pollen grain morphology: tectate, tricolporate, echinate Pollen grain size: 25.49 ± 0.91 µm by 24.18 ± 0.67 µm
Birdcherry, Prunus avium
Family: Rosaceae Pollen grain morphology: tricolporate, striate, tectate Pollen grain size: 38.68 ± 1.65 µm by 33.94 ± 1.18 µm
Creeping cinquefoil, Potentilla reptans
Family: Rosaceae Pollen grain morphology: tricolporate, striate, Pollen grain size: 31.11 ± 1.77 µm by 33.94 ± 1.07 µm