| latinský název | český název |
|---|---|
| Baccharis | pomíšenka |
| Bacopa | bakopa |
| Baeckea | bekea |
| Baileya | drobnuška |
| Baldellia | |
| Ballota | měrnice |
| Balsamita | maří list |
| Banksia | banksie |
| Baptisia | baptisie |
| Barbarea | barborka |
| Barleria | barlerie |
| Barringtonia | baringtonie |
| Bartsia | lepnice |
| Basella | bazela |
|
| |
| Bassia | bytel |
| Bauhinia | bauhinie |
| Beaucarnea | bokarnea |
| Beccariophoenix | |
| Begonia | begónie |
| Bellis | sedmikráska |
| Berberis | dřišťál |
| Bergenia | bergenie |
| Berchemia | okoralka |
| Berkheya | |
| Berlandiera | |
| Besleria | beslerie |
| Beta | řepa |
| Betula | bříza |
|
| |
| Bidens | dvouzubec |
| Billardiera | svitečka |
| Billbergia | bilbergie |
| Biophytum | citobýl |
| Bistorta | hadí kořen |
| Bituminaria | bituminárie |
| Bixa | bixa |
| Blechnum | žebrovice |
| Blephilia | |
| Bletia | bletie |
| Bletilla | |
| Boehmeria | ramie |
| Boerhavia | berhavie |
| Bolbitis | bolbitis |
|
| |
| Bomarea | bomarea |
| Bombax | bombax |
| Bombycilaena | protěžka |
| Borago | brutnák |
| Bougainvillea | bugenvilea |
| Bouteloua | |
| Bouvardia | bouvardie |
| Brachychiton | brachychiton |
| Brasiliopuntia | |
| Brassavola | |