Amsonia References Amsonia plant genus Ask Anything Homework Help Written by The Information Architects of Encyclopaedia Britannica The Information Architects maintain a master list of the topics included in the corpus of Encyclopædia Britannica, and create and manage the relationships between them. The Information Architects of Encyclopaedia Britannica Britannica AI Ask Anything Learn about this topic in these articles: Apocynaceae/ Major genera and speciesDogbane (Apocynum) and bluestar (Amsonia) are sometimes grown as ornamentals. The impala lily (Adenium multiflorum) is an ornamental shrub with star-shaped flowers and large underground tubers. Read MoreDogbane (Apocynum) and bluestar (Amsonia) are sometimes grown as ornamentals. The impala lily (Adenium multiflorum) is an ornamental shrub with star-shaped flowers and large underground tubers. Read More