Subgenus Paeonia
Sect. Paeonia
subsect. Paeonia
P. officinalis L.
subsp. officinalis
subsp. banatica (Rochel) Soo
subsp. humilis (Retz.) Cullen & Heywood
subsp. villosa (Huth) Cullen & Heywood
P. peregrina Miller
P. parnassica Tzanoudakis

sect. Palearcticae Huth emend. Uspensk
P. mascula (L.) Miller
subsp. mascula
subsp. arietina (G. Anderson) Cullen & Heywood
subsp. russi (Biv.) Cullen and Heywood
subsp. atlantica (Cosson) Greuter & Burdet
subsp. hellenica Tzanoudakis
var. hellenica
var. icarica (Tzanoudakis) Stearn
subsp. bodurii N. Ozhatay
subsp. kesrouanensis (Thiebaut) J. J. Halda
P. daurica Andrews
subsp. daurica
subsp. lagodechiana (Kem.-Nath.) J. J. Halda
P. x majko N. Ketzchoweli
P. coriacea Boiss
P. corsica Sieber ex Tausch
P. clusii F. C. Stern & Stearn
P. rhodia Stearn
P. broteroi Boiss. & Reuter

subsect. Tenuifoliae (Stern ex Uspensk.) J. J. Halda
P. tenuifolia L.
subsp. tenuifolia
subsp. biebersteiniana (Rupr.) J. J. Halda

subsect. Anomalae (Kem. - Nath. ex Uspensk.) J. J. Halda
P. anomala L.
subsp. anomala
subsp. hybrida (Pall.) J. J. Halda
P. veitchii Lynch
subsp. veitchii
var. woodwardii (Stapf ex Cox) F. C. Stern
subsp. altaica (K. M. Dai et T. H. Ying) J. J. Halda

sect. Albiflorae Salm-Dyck
P. lactiflora Pallas
P. emodi Wall. ex Royle
subsp. emodi
subsp. sterniana (H. R. Fletcher) J. J. Halda

subsect. Flavonia (Kem.- Nath.) Uspensk.
P. mlokosewitschii Lomakin
P. x chamaeleon Troitzky ex Grossh.
P. wittmanniana Hartwiss ex Lindley
subsp. wittmanniana
subsp. macrophylla (Albow) J. J. Halda

subsect. Obovatae Komarov ex Uspensk.
P. obovata Maximowicz
subsp. obovata
var. obovata
var. willmottiae (Stapf) Stern
subsp. japonica (Makino) J. J. Halda
P. mairei Leveille

Subgenus Onaepia (Lindley) Lynch
sect. Onaepia
subsp. brownii

subsp. californica