Question: Do the Trailing bellflower and the Pseudocydonia sinensis belong to the same plant family?
Sentence (from "Pseudocydonia"): It is closely related to the east Asian genus "Chaenomeles", and is sometimes placed in "Chaenomeles" as "C. sinensis", but notable differences are the lack of thorns, and that the flowers are produced singly, not in clusters.
Relevant evidence: No