Hybrid / Species crosses.  Coral-pink.  Mild fragrance.  Large, single bloom form.  Early.  Height of 26" to 32" (65 to 80 cm).   William Henry Krekler (1978).

7 favorite votes.  

Hybrid lactiflora.  Crimson - purple.  Moderate fragrance.  Very full bloom form.  Height of up to 3' (up to 90 cm).   Louis-Joseph-Ghislain Parmentier (1850).

7 favorite votes.  

Hybrid / Species crosses.  White, yellow center.  Large, single bloom form.  USDA zone 2a and warmer.  Height of up to 3' (up to 90 cm).   Prof. Arthur Percy Saunders (1950).

7 favorite votes.  

Hybrid suffruticosa, Tree peony.  White.  Mild fragrance.  Semi-double bloom form.  Early.  USDA zone 2a and warmer.  

7 favorite votes.  

Hybrid suffruticosa.   Auguste Dessert (1902).

7 favorite votes.  

Hybrid lactiflora.  Dark red.  Single bloom form.  Midseason.   Berneche (1924).

7 favorite votes.  

Hybrid lactiflora.   Julian L. Janus.

7 favorite votes.  

Tree peony.  Yellow.  Mild fragrance.  Mid.  USDA zone 2a and warmer.  

7 favorite votes.  

Hybrid lactiflora.  Light pink.  None / no fragrance.  Large, double bloom form.  Late.  Height of up to 28" (up to 70 cm).   Ben Gilbertson (1970).

7 favorite votes.  

Hybrid lactiflora.  Red.  Large, double bloom form.  Midseason.  Height of up to 28" (up to 70 cm).   Arthur L. Murawska (1959).

7 favorite votes.  

Hybrid lactiflora.  Ruby-red.  Mild fragrance.  Medium to large, double, bomb bloom form.  Late midseason.  USDA zone 6b through 9b (default).  Height of up to 3' (up to 90 cm).   François-Félix Crousse (1840-1925) (1881).

7 favorite votes.  

Hybrid lactiflora.   Berneche (1924).

7 favorite votes.  

Hybrid Lutea, Tree peony.  Butter-yellow, red flares.  Strong, sweet fragrance.  Semi-double bloom form.  Early-to-mid.  USDA zone 2a and warmer.  Height of 5' (150 cm).   Prof. Arthur Percy Saunders (1952).

7 favorite votes.  

Hybrid lactiflora.  Dark red.  Double bloom form.  Late midseason.  USDA zone 2a and warmer.  Height of up to 32" (up to 80 cm).   Edward Auten, Jr. (1952).

7 favorite votes.  

Hybrid lactiflora.  Cherry-red or crimson, purple shading.  Mild fragrance.  Medium to large, double, Japanese (anemone, imperial) bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 35" (up to 90 cm).   Jacques Calot (1863).

7 favorite votes.  

Hybrid lactiflora.   Walter J. Guille.

7 favorite votes.  

Hybrid lactiflora.   Berneche.

7 favorite votes.  

Hybrid suffruticosa.  Carmine-red.  Mild, rose fragrance.  Large, double, crown bloom form.   Charles His (1832).

7 favorite votes.  

Hybrid suffruticosa.  Rose-pink or light pink, lilac shading.  Strong fragrance.  Very large, semi-double to double, flat bloom form.  Early.  
Height: up to 6'7" (up to 200cm).   Unknown Chinese Breeder(s) (1794).

7 favorite votes.  

Tree peony.  Pink.  Mild fragrance.  Mid.  USDA zone 2a and warmer.  

7 favorite votes.  

Species, Tree peony.  Rose-pink.  Large, single bloom form.  USDA zone 2a and warmer.  Height of up to 4' 11" (up to 150 cm).  

7 favorite votes.  

Hybrid suffruticosa.  Purple.  Medium, double, lotus bloom form.   Charles His (1851).

7 favorite votes.  

Tree peony.  White.  USDA zone 2a and warmer.  

7 favorite votes.  

Hybrid lactiflora.   Prof. Arthur Percy Saunders (1921).

7 favorite votes.