Black Purple Cymbidium 
Black-striped leafy greenhood 
Bletia catenulata 
Bletia florida 
Blotched Hyacinth-orchid 
Blue fairy orchid 
Blue lady orchid 
Blue vanda 
Blunt Point Lepanthes 
Boat-shaped Column Dendrobium 
Bolivian aspidogyne 
Bonatea speciosa 
Bow-lip spider orchid 
Brassia euodes 
Brassia neglecta 
Brassia Spider's Gold 
Brassia warszewiczii 
Bratonia Shelob 'Tolkien' 
Bristley Pelexia 
Broad-leaved Helleborine 
Broad-leaved marsh orchid 
Broad-lipped twayblade 
Bulbophyllum claptonense 
Bulbophyllum fonsflorum