Wang Liangying et al.
Chinese Tree Peonies 1993, english translation published 1998
The Peony Association of China,
China Forestry publishing House, 7, Liuhai Hutong, West district, Beijing, P.R. China
Sub-section Vaginatae F. C. Stern
1. Paeonia spontanea (Rehder) T.Hong and W. Z. Zhao
2. Paeonia qiui Y.L.Pei and T.Hong
3. Paeonia rockii (S.G.Saw and L.A. Lauener) T.Hong and J. J. Li
P. rockii linyanshanii (T.Hong and J.J.Li)
4. Paeonia ostii T.Hong and J.X.Zhang i
5. Paeonia decomposita Hand.-Mazz.
Sub-section Delavayanae F. C. Stern
6. Paeonia potaninii Kom.
(1) Variant: P. potaninii Komarov var. trollioides Stapf ex F.C.Stern.
(2) Variant: P. potaninii Komarov forma alba (Bean) F.C.Stern,
7. Paeonia delavayi Franch.
8. Paeonia lutea Delav. ex Franch.
Paeonia lutea Delavay and Franch. var. ludlowii Stern and Taylor