Delavay peonies have a small single flower in dark purple. The two subspecies, the lutea and the potanini are instead marked respectively by a single bright yellow flower or a single, red flower.
Delavayanae tree peony with the following characteristics: small, single flower, in a colour ranging from cardinal red to chocolate brown, presented in the 19th century as "brown peony".
Delavayanae tree peony with the following characteristics: small flowers, mainly from bright to dark yellow with light or dark brown streaks and stamens in the same colour.
The yellow Delavay Peony is a tree peony which is part of the Delavayanae subdivision and has the following characteristics: Very bright yellow flowers, with orange-red stamens and filaments.