Yellow hopclover, Trifolium campestre
Family: Fabaceae Pollen grain morphology: tricolporate, subprolate, tectate Pollen grain size: 26.18 ± 1.07 µm by 21.58 ± 1.77 µm
Yellow flag, Iris pseudacorus
Family: Iridaceae Pollen grain morphology: monocolpate, elliptical, reticulum coarse Pollen grain size: 114.98 µm by 101.86 µm
White water-lily, Nymphaea odorata
Family: Pollen grain morphology: monocolpate, numerous/variable processes (gemmae, clavae, bacculae, echinae) Pollen grain size: 28.00 ± 1.60 µm by 23.14 ± 0.42 µm
White sweet clover, Melilotus alba
Family: Fabaceae Pollen grain morphology: tricolporate, prolate, tectate Pollen grain size: 23.18 ± 0.94 µm by 19.70 ± 1.33 µm
Lonicera spp.
Family: Caprifoliaceae Pollen grain morphology: tricolporate, subprolate, echinate Pollen grain size: 53.77 ± 0.64 µm by 51.29 ± 0.13 µm
White avens, Guem canadense
Family: Rosaceae Pollen grain morphology: tricolporate, subprolate, tectate Pollen grain size: 21.84 ± 0.88 µm by 19.77 ± 0.33 µm
Clasping Venus’s looking glass, Triodanis perfoliata
Family: Campanulaceae Pollen grain morphology: stephanoporate, tectate, echinate Pollen grain size: 29.06 µm by 27.14 µm
Valerian, Valeriana officinalis
Family: Caprifoliaceae Pollen grain morphology: tricolporate, echinate Pollen grain size: 43.84 µm by 41.01 µm
Smooth solomon’s seal, Polygonatum biflorum
Family: Asparagaceae Pollen grain morphology: monocolpate, elliptical, psilate, scrabe or reticulate Pollen grain size: 48.12 ± 2.42 µm by 36.95 ± 0.80 µm
Trout lily, Erythronium americanum
Family: Liliaceae Pollen grain morphology: monocolpate, prolate, intectate Pollen grain size: 80.01 ± 4.10 µm by 59.78 ± 1.88 µm