| NAME OF PLANT | WHERE FOUND | DATE | WHERE FOUND | DATE |
| Bidens cernua | ||||
| nodding bur-marigold | ||||
| Bidens tripartita | ||||
| trifid bur-marigold | ||||
| Blackstonia perfoliata | ||||
| yellow-wort | ||||
| Blechnum spicant | ||||
| hard fern | ||||
| Blysmus compresssus | ||||
| flat-sedge | ||||
| Blysmus rufus | ||||
| saltmarsh flat-sedge | ||||
| Bolboschoenus maritimus | ||||
| sea club-rush | ||||
| Botrychium lunaria | ||||
| moonwort | ||||
| Brachypodium pinnatum | ||||
| tor-grass | ||||
| Brachpodium sylvaticum | ||||
| false-brome | ||||
| Brassica napus | ||||
| rape | ||||
| Brassica nigra | ||||
| black mustard | ||||
| Brassica oleracea | ||||
| cabbage | ||||
| Briza media | ||||
| quaking-grass | ||||
| Bromopsis erecta | ||||
| upright brome | ||||
| Bromopsis ramosa | ||||
| hairy brome | ||||
| Bromus hordeaceus | ||||
| soft-brome | ||||
| Bryonia dioica | ||||
| white bryony | ||||
| Buddleja davidii | ||||
| butterfly bush | ||||
| Butomus umbellatus | ||||
| flowering rush | ||||
| 11 | ||||