Betonica officinalis
Betony
Betula pendula
Silver Birch
Betula pubescens
Downy Birch
Bidens cernua
Nodding Bur-marigold
Bidens pilosa
Spanish-needles
Bidens tripartita
Trifid Bur-marigold
Bignonia magnifica
Glowvine
Bismarckia nobilis
Bismarck Palm
Bistorta officinalis
Common Bistort
Bistorta vivipara
Alpine Bistort
Blackstonia perfoliata
Yellow-wort
Blechnum orientale
Blechnum spicant
Hard-fern
Blitum bonus-henricus
Good-King-Henry
Blumea balsamifera
Sambong
Blysmus compressus
Flat-sedge
Boerhavia erecta
Erect Spiderling
Bolboschoenus maritimus
Sea Club-rush
Borago officinalis
Borage
Borago pygmaea
Slender Borage
Botrychium lunaria
Moonwort
Bougainvillea glabra
Brachyglottis x jubar
Shrub Ragwort
Brachypodium sylvaticum
False-brome