Diervilla References Diervilla plant clade 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: Dipsacales/ Diervilla clade The Diervilla clade contains 16 species in two genera—Diervilla, with North American species, and Weigela, with East Asian species. Many of these are cultivated as ornamental shrubs in temperate areas for their colourful flowers. Read More The Diervilla clade contains 16 species in two genera—Diervilla, with North American species, and Weigela, with East Asian species. Many of these are cultivated as ornamental shrubs in temperate areas for their colourful flowers. Read More