genus Blennius
genus Blephilia
genus Bletia
genus Bletilla
genus Blighia
genus Blissus
genus Bloomeria
genus Bocconia
genus Boehmeria
genus Bolbitis
genus Boletellus
genus Boletus
genus Boltonia
genus Bomarea
genus Bombax
genus Bombina
genus Bombus
genus bombycilla
genus Bombyx
genus Bonasa
genus Borago
genus Borassus
genus Borrelia
genus Bos
genus Boselaphus
genus Boswellia
genus Botaurus
genus Bothrops
genus Botrychium
genus Bougainvillaea
genus Bougainvillea
genus Bouteloua
genus Bowiea
genus Boykinia
genus Brachinus
genus Brachychiton
genus Brachycome
genus Brachystegia
genus Bradypus
genus Brama
genus Branchiobdella
genus Branta
genus Brasenia
genus Brassavola
genus Brassia
genus Brassica
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
genus Buckleya
genus Buddleia
genus Budorcas
genus Bufo
genus Bulnesia
genus Bumelia
genus Bungarus
genus Buphthalmum
genus Burhinus
genus Burmannia
genus Burmeisteria
genus Bursera
genus Butea
genus Buteo
genus Buxus
genus Cabassous
genus Cabomba
genus Cacajao
genus Cacalia
genus Cacatua
genus Cacicus
genus Cadra
genus Caenolestes
genus Caesalpinia
genus Caiman
genus Cairina
genus Cajanus
genus Cakile
genus Caladenia
genus Caladium
genus Calamagrostis
genus Calamintha
genus Calamus