Hybrid suffruticosa, Tree peony.  White.  Double, Japanese (anemone, imperial) bloom form.  Mid.  USDA zone 2a and warmer.   Unknown Chinese Breeder(s).

6 favorite votes.  

Hybrid lactiflora.  White.  Large, double, bomb bloom form.  Midseason.   Col. Jesse C. Nicholls (1954).

6 favorite votes.  

Japanese, Tree peony.  Red.  Double bloom form.  USDA zone 2a and warmer.   Unknown Japanese Breeder(s).

6 favorite votes.  

Hybrid Lutea, Tree peony.  Crimson, dark red flares.  Large, single to semi-double bloom form.  Mid.  USDA zone 2a and warmer.  Height of up to 3' (up to 90 cm).   Prof. Arthur Percy Saunders (1942).

6 favorite votes.  

Hybrid lactiflora.  Rose-pink, cream center, buff center, rose-pink center.  Mild fragrance.  Medium, double bloom form.  Midseason.  Height of up to 39" (up to 100 cm).   Unknown Chinese Breeder(s).

6 favorite votes.  

Intersectional Hybrid / Itoh.  White, lavender flares.  None to mild fragrance.  Semi-double bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 2' (up to 60 cm).   Roger F. Anderson (1984).

6 favorite votes.  

Hybrid suffruticosa.  Light pink.  Large bloom form.   Charles His (1851).

6 favorite votes.  

Hybrid lactiflora.  Light pink.  Mild fragrance.  Large, double, rose bloom form.  Mid-to-late.  Height of up to 35" (up to 90 cm).   Walter Z. Mains (1955).

6 favorite votes.  

Hybrid lactiflora.   Julian L. Janus.

6 favorite votes.  

Hybrid suffruticosa, Tree peony.  Dark purple, black flares.  Strong fragrance.  Medium, full, crown bloom form.  Midseason.  USDA zone 2a and warmer.   Unknown Chinese Breeder(s) (1973).

6 favorite votes.  

Hybrid suffruticosa, Tree peony.  Pink, darker center, lighter edges.  Very large, double bloom form.  Midseason.   Michel Rivière (1992).

6 favorite votes.  

Hybrid lactiflora.  White, light yellow center.  Large, Japanese (anemone, imperial) bloom form.  Midseason.  USDA zone 2a and warmer.   Dr. John H. Neeley (1930).

6 favorite votes.  

Hybrid lactiflora.   Pfeiffer Nursery (1932).

6 favorite votes.  

Hybrid lactiflora.   D.M. Andrews (1923).

6 favorite votes.  

Hybrid lactiflora.  Pink, yellow undertones, ages to lighter .  Medium, bomb, cupped bloom form.  Early-to-mid.  Height of up to 30" (up to 75 cm).   Robert William Tischler (2000).

6 favorite votes.  

Hybrid lactiflora.  Light pink, yellow center, ages to white .  Strong fragrance.  Large, semi-double bloom form.  Early-to-mid.  USDA zone 6b through 9b (default).  Width of 4' (120 cm). J.R. Mann (1936), Julius J. Van Steen (1936).

6 favorite votes.  

Hybrid lactiflora.  Deep pink and light pink.  Various colours on same plant, also white..  Moderate fragrance.  Large, double, bomb bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 28" (up to 70 cm).   Carl G. Klehm (1960).

6 favorite votes.  

Species, Tree peony.  Crimson, brown shading.  Medium, single bloom form.  USDA zone 6b through 9b (default).  Height of 5½' to 6' (165 to 185 cm).   Père Jean Marie Delavay (1884).

6 favorite votes.  

Herbaceous species, Species.  Red.  Single bloom form.  USDA zone 2a and warmer.  

6 favorite votes.  

Hybrid suffruticosa, Tree peony.  Light pink, salmon-pink shading.  Moderate fragrance.  Large, double bloom form.  Early.   Koenig (1847).

6 favorite votes.  

Hybrid lactiflora.  Light pink, cherry-red stripes.  Double bloom form.  Mid.  USDA zone 2a and warmer.  Height of 32" to 34" (80 to 85 cm).   Roy G. Klehm (1969).

6 favorite votes.  

Hybrid lactiflora.  Crimson, purple shading.  Japanese (anemone, imperial) bloom form.   Edouard Doriat (1930).

6 favorite votes.  

Hybrid / Species crosses.  Dark red, white streaks, stripes, flecks.  Single bloom form.  Midseason.  Height of up to 2' (up to 60 cm).   Nathan Rudolph (1963).

6 favorite votes.  

Hybrid lactiflora.   Kelway (and Son) (1917).

6 favorite votes.