Babiana Baccharis Backhousia Bacopa (water hyssop) Bactris Baeckea Baikiaea Baileya Ballota Balsamorhiza (balsam root) Bambusa (bamboo) Banksia Baptisia an orchid genus Barbarea (yellow rocket or winter cress) Barkeria (an orchid genus) Barleria Barklya (gold blossom tree) Barnadesia Barringtonia Bartlettina Basselinia Bassia Bauera Bauhinia Baumea Beallara an orchid hybrid genus Beaucarnea Beaufortia Beaumontia Beccariella Bedfordia Begonia Belamcanda Bellevalia Bellis (daisy) Bellium Berberidopsis Berberis (barberry) Berchemia Bergenia Bergerocactus Berkheya Berlandiera Berrya Bertolonia Berzelia Beschorneria Bessera Beta (beet) Betula (birch) Biarum Bidens Bignonia Bikkia Billardiera Billbergia Bischofia Bismarckia Bixa Blandfordia Blechnum (hard fern) Bletilla (an orchid genus) Blighia Bloomeria Blossfeldia Bocconia Boenninghausenia Bolax Bolbitis Bollea (an orchid genus) Boltonia Bolusanthus Bomarea Bombax Bongardia Boophone Borago Borassodendron Borassus Boronia Bosea Bossiaea Bothriochloa Bougainvillea Bouteloua Bouvardia Bowenia Bowiea Bowkeria Boykinia Brabejum Brachychiton Brachyglottis Brachylaena Brachypodium Brachyscome Brachysema Brachystelma Bracteantha Brahea (hesper palm) Brassavola (an orchid genus) Brassaia (octopus tree) Brassia (an orchid genus) Brassica (mustard, cabbage) Brassidium (hybrid orchids) Brassocattleya (hybrid orchids) Brassolaeliocattleya (trigeneric hybrid orchids) Breynia Briggsia Brillantaisia Brimeura Briza (quaking grass) Brodiaea Bromelia Broughtonia an orchid genus Broussonetia Browallia Brownea Browningia Bruckenthalia Brugmansia Brunfelsia Brunia Brunnera Brunsvigia Brya Buchloe Buckinghamia Buddleja Buglossoides Bulbine Bulbinella Bulbocodium Bulbophyllum (an orchid genus) Bulnesia Bunchosia Buphthalmum Bupleurum Burchardia Burchellia Burrageara an orchid hybrid genus Burretiokentia Bursaria Bursera Burtonia Butea Butia Butomus Buxus (boxwood) Byrsonima Bystropogon
Another crappy thumbnail 'cause I honestly couldn't think of anything uwu Credit to Wikipedia for the names
