B Genus species (Common Name) Plant Picture Pollen Picture Begoniaceae Begonia semperflora Wax Begonia Pollen description Berberidaceae Berberis koreana Korean Barberry Pollen description Berberis thunbergii Barberry Pollen description Betulaceae Carpinus caoliniana American Hornbeam Pollen description Ostrya knowltonii Western Hophornbean Pollen description Boraginaceae Cynoglossum officinale Hounds tongue Pollen description Symphytum officinale Compfry Pollen description Brassicaceae Arabis caucasica Lotti White Pollen description Aurinia saxatilis Basket of Gold Pollen description Chorispora tenella Blue Mustard Pollen description Descurainia sophia Flixweed Pollen description Iberin sempervirea Snow Thimble Pollen description Lipidium draba White Top Pollen description Raphanus Radish Pollen description Sinapis arvensis Wild Mustard Pollen description