| Bachbunge | Veronica |
| Bachminze | Mentha |
| Bahia-Piassavapalme | Attalea |
| Balatabaum | Manilkara |
| Baldrian | Valeriana |
| Baldrian, Afrikanischer | Fedia |
| Ballonblume | Platycodon |
| Ballonpflanze | Cardiospermum |
| Balsa | Ochroma |
| Balsabaum | Ochroma |
| Balsamapfel | Clusia |
| Balsamapfel | Momordica |
| Balsambaum | Amyris |
| Balsambaum | Myroxylon |
| Balsambirne | Momordica |
| Balsamine | Impatiens |
| Balsampappel | Populus |
| Balsampflaume, Süße | Spondias |
| Balsamstrauch | Commiphora |
| Balsamtanne | Abies |
| Bambara-Erdnuß | Vigna |
| Bambus | Bambusa |
| Bambushirse | Panicum |
| Banane | Musa |
| Bandbusch | Homalocladium |
| Bandfarn | Vittarta |
| Bandstockweide | Salix |
| Banksrose | Rosa |
| Banyanbaum | Ficus |
| Baobab | Adansonia |
| Barbarakraut | Barbarda |
| Barbenkraut | Barbarda |
| Bärengras | Xerophyllum |
| Bärenklau | Heracleum |
| Bärenlauch | Allium |
| Bärenohr | Arctotis |
| Bärentraube | Arctostophylos |
| Bärlapp | Lycopodium |
| Bartblume | Caryopteris |
| Bartfaden | Penstemon |
| Bartgras | Bothriochloa |
| Bartnelke | Dianthus |
| Bärwurz | Meum |
| Basilikum | Ocimum |
| Bastardindigo | Amorpha |
| Bastpalme | Raphia |
| Batate | Ipomoea |
| Batokopflaume | Flacourtia |
| Bauerntabak | Nicotiana |
| Baumdahlie | Dahlia |
| Baum der Reisenden | Ravenala |
| Baumfreund | Philodendron |
| Baumfuchsie | Fuchsia |
| Baumhasel | Corylus |
| Baumheide | Erica |
| Baumlupine | Lupinus |
| Baummohn | Dendromecon |
| Baumtomate | Cyphomandra |
| Baumwacholder | Juniperus |
| Baumweichsel | Prunus |
| Baumwolle | Gossypium |
| Baumwürger | Celastrus |
| Bayrumbaum | Pimenta |
| Becherpflanze | Silphium |
| Becherprimel | Primula |
| Becherschwertel | Cypilla |
| Beerenmalve | Malvaviscus |
| Beifuß | Artemisia |
| Beinbrech | Narthecium |
| Beinwelk | Symphytum |
| Beißkohl | Beta |
| Belladonnalilie | Amaryllis |
| Benediktenkraut | Cnicus |
| Bengalrose | Rosa |
| Bennußbaum | Moringa |
| Benzoe-Storaxbaum | Styrax |
| Berberitze | Berberis |
| Bergahorn | Acer |
| Bergamotte | Citrus |
| Bergaralie | Oreopanax |
| Bergaster | Aster |
| Bergbaldrian | Valeriana |
| Bergfenchel | Siseli |
| Bergflockenblume | Centaurea |
| Berghahnlein | Anemone |
| Berghülse | Nemopanthus |
| Bergkaffee | Coffea |
| Bergkerbel | Chaerophyllum |
| Bergkiefer | Pinus |
| Berglorbeer | Kalmia |
| Berglorbeer | Umbellularia |
| Bergmahagoni | Cercocdrpus |
| Bergpalme | Chamaedorea |
| Bergscharte | Leuzea |
| Bergtee | Sideritis |
| Bergulme | Ulmus |
| Bergwundklee | Anthyllis |
| Bermudagras | Cynodon |
| Bertram | Anacyclus |
| Bertramsgarbe | Achillea |
| Berufkraut | Erigeron |
| Besenginster | Cytisus |
| Besenheide | Calluna |
| Besenkraut | Kochia |
| Bete | Beta |
| Betelnußpalme | Areca |
| Betelpalme | Areca |
| Betelpfeffer | Piper |
| Bibernelle | Pimpinellia |
| Bibernellrose | Rosa |
| Bienenfreund | Phacelia |
| Besenkraut | Hyoscyamus |
| Bindesalat | Lactuca |
| Bingelkraut | Mercurialis |
| Binse | Juncus |
| Binsenginster | Spartium |
| Binsenkaktus | Rhipsalis |
| Binsenlilie | Sisyrinchium |
| Birke | Betula |
| Birnbaum | Pyrus |
| Bisamdistel | Jurinea |
| Bisamhyazinthe | Muscari |
| Bisamklee | Trigonella |
| Bisamkürbis | Cucurbita |
| Bischofsmütze | Astrophytum |
| Bitterdistel | Cnicus |
| Bitterholz | Picrasma |
| Bitterklee | Menyanthes |
| Bitterkraut | Picris |
| Bittermandelbaum | Prunus |
| Bitternuß | Carya |
| Bitterorange | Citrus |
| Bittersüß | Solanum |
| Blasenbaum | Koelreuteria |
| Blasenfarn | Cystopteris |
| Blasenspiere | Physocarpus |
| Blasenstrauch | Colutea |
| Blatt, Wanderndes | Camptosarus |
| Blatteibe | Phyllocladus |
| Blatterkohl | Brassica |
| Blattkaktus | Epiphyllum |
| Blattkohl | Brassica |
| Blattmangold | Beta |
| Blattpetersilie | Petroselinum |
| Blattsalat | Lactuca |
| Blaubart | Caryopteris |
| Blaubeere | Vaccinium |
| Blaudolde | Didiscus |
| Blaue Orchidee | Agnisia |
| Blaue Orchidee | Aganisia |
| Blaue Palme | Hyophorbe |
| Blauesche | Fraxinus |
| Blaues-Lieschen | Exacum |
| Blaugras | Sesleria |
| Blaugummibaum | Eucalyptus |
| Blauheide | Phyllodoce |
| Blauholz | Haematdxylum |
| Blaukissen | Aubrieta |
| Blauspiere | Sibiraea |
| Blaustern, amerikanischer | Amsonia |
| Blausternchen | Lobelia |
| Blausternchen | Scilla |
| Bleibusch | Amorpha |
| Bleichsellerie | Apium |
| Bleiholz | Dirca |
| Bleiwurz | Plumbago |
| Blockzitwer | Zingiber |
| Blumenbinse | Butomus |
| Blumenesche | Fraxinus |
| Blumenhartriegel | Cornus |
| Blumenkohl | Brassica |
| Blumenrohr | Canna |
| Blutauge | Potentilla |
| Blutblume | Haemanthus |
| Blutbuche | Fagus |
| Blutfennich | Digitaria |
| Bluthirse | Digitaria |
| Blutholz | Haematoxylum |
| Blutjohannisbeere | Ribes |
| Blutpflaume | Prunus |
| Blutstendel | Ludisia |
| Blutweiderich | Lythrum |
| Blutwurz | Potentilla |
| Bobaum | Ficus |
| Bocksbart | Tragopogon |
| Bocksdorn | Lycium |
| Bockshornklee | Trigonella |
| Bocksknöterich | Atraphaxis |
| Bogenhanf | Sansevieria |
| Bohne | Phaseolus |
| Bohne Dicke | Vicia |
| Bohnenkraut | Satureja |
| Bolle | Allium |
| Bombayhanf | Crotalaria |
| Bootfarn | Angiopteris |
| Borassuspalme | Borassus |
| Boretsch | Borago |
| Borstenhirse | Setaria |
| Borstgras | Nardus |
| Bourbonrose | Rosa |
| Boysenberry | Rubus |
| Brachsenkraut | Isoetes |
| Brandkraut | Phlomis |
| Brandschopf | Celosia |
| Brasilholz | Caesalpinia |
| Brasilnußbaum | Bertholletia |
| Braunelle | Prunella |
| Braunkohl | Brassica |
| Braunwurz | Scrophularia |
| Braut in Haaren | Nigella |
| Brautmyrte | Myrtus |
| Brautprimel | Primula |
| Brechnußbaum | Strychnos |
| Brechstrauch | Psychotria |
| Brechwurzel | Cephadlis |
| Breiapfelbaum | Manilkara |
| Breitlauch | Allium |
| Breitwegerich | Plantago |
| Brennende Liebe | Lychnis |
| Brennessel | Urtica |
| Brennessel Große | Urtica |
| Brennessel Kleine | Urtica |
| Brennpalme | Caryota |
| Brennwinde | Caiophora |
| Brianconaprikose | Prunus |
| Brillenschote | Biscutella |
| Brokkoli | Brassica |
| Brombeere | Rubus |
| Bronzeblatt | Galax |
| Brotfruchtbaum | Artocarpus |
| Brotnußbaum | Brosimum |
| Brotpalmfarn | Encephalartos |
| Brown sarson | Brassica |
| Bruchkraut | Herniaria |
| Brunnenkresse | Nasturtium |
| Brutblatt | Bryophyllum |
| Brutblatt | Kalanchoe |
| Bubiköpfchen | Soleirolia |
| Bucharaklee Weißer | Mehlotus |
| Buche | Fagus |
| Buchenfarn | Thelypteris |
| Buchsbaum | Buxus |
| Buchtenfarn | Hypalepis |
| Buchweizen | Fagopyrum |
| Buddhafinger | Citrus |
| Buddleie | Buddleja |
| Büffelbeere | Shephdrdia |
| Büffelgras | Buchloe |
| Bukkostrauch | Agathosma |
| Bunge | Samolus |
| Bunya-Bunya-Baum | Araucaria |
| Burgunderrube | Beta |
| Buripalme | Corypha |
| Buripalme | Polyandrococos ? |
| Bürstengras | Polypogon |
| Buschbohne | Phaseolus |
| Büschelglocke | Edraianthus |
| Büschelhaargras | Stipa |
| Buschklee | Lespedeza |
| Buschmannskerze | Sarcocaulon |
| Buschnelke | Dianthus |
| Buschwindröschen | Anemone |
| Butterbaum | Cotyledon |
| Butterbaum Indischer | Diploknema |
| Butterblume | Ranunculus |
| Butternußbaum | Juglans |