Hybrid / Species crosses.  Dark red.  Double bloom form.  Mid.  USDA zone 2a and warmer.   William Henry Krekler (1965).

6 favorite votes.  

Hybrid / Species crosses.  Crimson.  Semi-double bloom form.  Early-to-mid.  USDA zone 2a and warmer.  Height of up to 2' (up to 60 cm).   Prof. Arthur Percy Saunders (1941).

6 favorite votes.  

Hybrid lactiflora.  Dark red.  Staminoids edged yellow.  Japanese (anemone, imperial) bloom form.  Midseason.  USDA zone 2a and warmer.   R.H. Jones (1957).

6 favorite votes.  

Hybrid / Species crosses.  Dark red.  Large, single bloom form.  Very early.  USDA zone 2a and warmer.   Edward Auten, Jr. (1937).

6 favorite votes.  

Hybrid lactiflora.   Joseph Bernstein.

6 favorite votes.  

Hybrid lactiflora.  White, cream center.  Moderate fragrance.  Very large, Japanese (anemone, imperial) bloom form.  Mid.  USDA zone 2a and warmer.  Height of 30" to 3' (75 to 90 cm).   Myron D. Bigger (1937).

6 favorite votes.  

Hybrid lactiflora.  Silvery pink outer petals, cream and crimson petals mingled in center.  Strong fragrance.  Medium, full, crown bloom form.  Mid-to-late.  USDA zone 2a and warmer.  Height of up to 26" (up to 65 cm).   BRAND (1913).

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.  

Hybrid lactiflora.  Seashell-pink, lighter center, salmon-pink shading, ages to lighter .  Small bonnet.  Rose, sweet fragrance.  Large, full, rose bloom form.  Early-to-mid.  USDA zone 2a and warmer.   Unknown Dutch Breeder (1905).

6 favorite votes.  

Hybrid rockii, Tree peony.  Light pink, dark red flares, ages to white .  Moderate fragrance.  Large, semi-double bloom form.  Midseason.   Chen Dezhong (2002).

6 favorite votes.  

Hybrid lactiflora.   Julian L. Janus.

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.  Pink, purple shading, yellow center.  Moderate fragrance.  Single bloom form.  Early.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).   Max Josef Goos (1912), August Koenemann (1912).

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.  French white or blush white, ages to white .  Center flower is double; side shoots produce semi-double, saucer-shaped blooms showing golden stamens.  Moderate fragrance.  Large, semi-double to double, cupped bloom form.  Early-to-mid.  USDA zone 2a and warmer.  
Height: up to 3' (up to 90cm).   Kelway (and Son) (1902).

6 favorite votes.  Average rating: EXCELLENT.  

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.   Edward Auten, Jr. (1937).

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.  Color varies from purple-crimson to peach; yellow and white forms are classed separately.  Medium, single bloom form.  USDA zone 6b through 9b (default).  
Height: 5½' to 6' (165 to 185cm).   Père Jean Marie Delavay (1884).

6 favorite votes.  

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

6 favorite votes.  

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

6 favorite votes.  

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

6 favorite votes.