Hybrid suffruticosa.  Dark red.  Semi-double bloom form.  Midseason.  Height of up to 3' (up to 90 cm).   Toichi Domoto (1987).

9 favorite votes.  Average rating: EXCELLENT.  

Hybrid / Species crosses.  Light yellow, yellow center, ages to white .  Medium, single bloom form.  Very early.  USDA zone 2a and warmer.  Height of 28" to 32" (70 to 80 cm).  Width of 4' (120 cm). Dr. Earl B.N. White (1954).

9 favorite votes.  Average rating: EXCELLENT.  

Hybrid suffruticosa, Tree peony.  Seashell-pink, red flares.  Single, ruffled bloom form.  Early.  USDA zone 2a and warmer.  Height of 4' (120 cm).   William H. Gratwick III (1959).

9 favorite votes.  

Hybrid / Species crosses.  Coral-red.  Moderate fragrance.  Large, semi-double, flat, ruffled bloom form.  Early.  USDA zone 2a and warmer.  Height of 32" to 47" (80 to 120 cm).   Samuel E. Wissing (1970).

9 favorite votes.  

Hybrid / Species crosses.   Julian L. Janus.

9 favorite votes.  

Hybrid suffruticosa, Tree peony.  Light green.  Strong fragrance.  Small to medium, double, crown bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 47" (up to 120 cm).  Width of 2' (60 cm). Unknown Chinese Breeder(s).

9 favorite votes.  

Hybrid / Species crosses.  Scarlet, yellow center.  Small, single, flat bloom form.  Early-to-mid.  Height of 2' to 28" (60 to 70 cm).   Don Hollingsworth (1984).

9 favorite votes.  

Hybrid lactiflora.  White.  Mild to strong, medicinal fragrance.  Large, Japanese (anemone, imperial) bloom form.   Unknown Japanese Breeder(s) (1909).

9 favorite votes.  

Hybrid lactiflora.  Dark red, dark red center.  Wine-red. Cream-tipped wine-red petaloids.  Medium to large, Japanese (anemone, imperial) bloom form.  Early.  USDA zone 2a and warmer.  Height of 34" (85 cm).   William Henry Krekler (1965).

9 favorite votes.  

Hybrid lactiflora.  Light pink, yellow center, ages to white .  Very large, double bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).   Van der Valk (1952).

9 favorite votes.  

Hybrid / Species crosses.  Rose-pink.  Moderate fragrance.  Semi-double, cupped bloom form.  Late.  USDA zone 2a and warmer.   Prof. Arthur Percy Saunders (1934).

9 favorite votes.  

Hybrid rockii, Tree peony.  White, red flares.  Large, semi-double to double bloom form.  Midseason.  Height of up to 5' (up to 150 cm).   Sir Peter Smithers (1978).

9 favorite votes.  

Hybrid lactiflora.  Lemon-yellow.  Moderate fragrance.  Semi-double to double, ruffled bloom form.  Early-to-mid.  
Height: up to 35" (up to 90cm).   Bruce & Dorothy Hamilton (1988).

9 favorite votes.  

Herbaceous species, Species.  Red.  Single bloom form.  Mid.  USDA zone 8b through 10b.  Height of 2' (60 cm).  Width of 2' (60 cm). Unknown breeder (1797).

9 favorite votes.  

Hybrid lactiflora.  Light pink, cream undertones.  Mild fragrance.  Semi-double bloom form.  Midseason.  Height of up to 37" (up to 95 cm).   E.L. "Roy" Pehrson (1980).

9 favorite votes.  

Species, Tree peony.  Yellow.  Medium, single bloom form.  USDA zone 6b through 9b (default).  Height of 8' to 10' (245 to 305 cm).  Width of 10' to 13' (305 to 395 cm). Frank Ludlow (1936), Major George Sherriff (1936).

9 favorite votes.  

Species, Tree peony.  White, light pink shading.  Medium to large, single bloom form.  USDA zone 2a and warmer.  Height of up to 5' (up to 150 cm).  

9 favorite votes.  

Hybrid Lutea.  Crimson, dark brown shading.  Single to semi-double bloom form.   Prof. Arthur Percy Saunders (1940).

9 favorite votes.  

Hybrid suffruticosa, Tree peony.  Carmine-pink.  Large, double bloom form.  Midseason.  USDA zone 2a and warmer.   Unknown Japanese Breeder(s).

9 favorite votes.  

Hybrid / Species crosses.  Red, yellow center.  Single bloom form.  Early.  Height of up to 3' (up to 90 cm).   Dr. Earl B.N. White (1954).

9 favorite votes.  

Hybrid lactiflora.  Light pink, rose-pink mottling.  Double bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 35" (up to 90 cm).   B.B. Wright.

9 favorite votes.  Average rating: EXCELLENT.  

Hybrid lactiflora.  Red.  None / no fragrance.  Large, full bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 3' (up to 90 cm).   D. Steve Varner (1970).

8 favorite votes.  

Herbaceous species, Species.  Red.  Citrus fragrance.  Single bloom form.  Early.  USDA zone 2a and warmer.  Height of 20" to 2' (50 to 60 cm).  

8 favorite votes.  

Hybrid lactiflora.  Red.  Double bloom form.  

8 favorite votes.