genus Bradypus genus Brama genus Branchiobdella genus Branta genus Brasenia genus Brevoortia genus Brickelia genus Brodiaea genus Bromus genus Brontosaurus
| genus Broussonetia genus Browallia genus Browmius genus Bruchus genus Bruckenthalia genus Brugmansia genus Brunfelsia genus Brya genus Bryanthus genus Bryonia
| genus Bryum genus Bubalus genus Bubo genus Bubulcus genus Bucephala genus Buceros genus Buchloe
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