Blepharis sindica 
Blond plantain 
Blood-Drop-Emlets 
Blue Bladderwort 
Blue Broomrape 
Blue eranthemum 
Blue Jacaranda 
Blue porterweed 
Blue Porterweed 
Blue Pussyleaf 
Blue skullcap 
Blue Vervain 
Bluebeard 
Bluewings 
Bodiniers Beautyberry 
Bonnaya ciliata 
Border privet 
Bower of beauty 
Bracted Plantain 
Bravaisia integerrima 
Brazilian plume 
Brazilian Red-Cloak 
Brazilian verbena 
Breckland Thyme