1. Annual having the stem beset with curved prickles; North America and Europe and Asia
   - cleavers, clivers, goose grass, catchweed, Galium aparine

Type of: bedstraw

• 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