Baccharis, Genus
Baldellia, Genus
Ballota, Genus
Balsaminaceae, Family
Barbarea, Genus
Bassia, Genus
Bellis, Genus
Berberidaceae, Family
Berberis, Genus
Berteroa, Genus
Berula, Genus
Beta, Genus
Betula, Genus
Betulaceae, Family
Bidens, Genus
Bifora, Genus
Bignoniaceae, Family
Blackstonia, Genus
Blechnaceae, Family
Blechnum, Genus
Blysmus, Genus
Bolboschoenus, Genus
Boraginaceae, Family
Boraginales, Order
Borago, Genus
Botrychium, Genus
Brachypodium, Genus
Brassica, Genus
Brassicaceae, Family
Brassicales, Order
Briza, Genus
Bromopsis, Genus
Bromus, Genus
Brunnera, Genus
Bryonia, Genus
Buddleja, Genus
Buddlejaceae, Family
– synoniem van Scrophulariaceae, Family
Bunias, Genus
Bunium, Genus
Bupleurum, Genus
Butomacae, Family
Butomaceae, Family
Butomus, Genus
Buxaceae, Family
Buxales, Order
Buxus, Genus