Allamanda angustifolia 
Allamanda blanchetii 
Alpine gentian 
Arachnothryx leucophylla 
Arctic Gentian 
Ashanti Blood 
Asperula libanotica 
Asperula setosa 
Autumn Gentian 
Azure Bluet 
Balloonplant 
Be-still Tree 
Beadplant 
Bladder Gentian 
Blue field-madder 
Blue periwinkle 
Blue Woodruff 
Bottle gentian 
Bulgarian gentian 
Burser's Gentian 
Butterfly Weed 
Buttonbush 
Callipeltis aperta 
Callipeltis factorovskyi