Adenium obesum (Desert rose) 
Allamanda angustifolia 
Alpine gentian 
American Columbo 
Antelope horns 
Arachnothryx leucophylla 
Arctic Gentian 
Ashanti Blood 
Asperula libanotica 
Asperula setosa 
Autumn Gentian 
Azure Bluet 
Be-still Tree 
Beadplant 
Bicolor Persian violet 
Bladder Gentian 
Blue field-madder 
Blue periwinkle 
Blue Woodruff 
Bottle gentian 
Bottle Gentian 
Broad-leaved cotton bush 
Broad-leaved Crucianella 
Bulgarian gentian