Hybrid lactiflora.  Red, yellow center.  Large, single bloom form.  Very early.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).   Edward Auten, Jr. (1933).

8 favorite votes.  

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

8 favorite votes.  

Hybrid lactiflora.  Salmon-pink.  Moderate fragrance.  Double bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 3' (up to 90 cm).   Carl G. Klehm (1950).

8 favorite votes.  

Hybrid Lutea, Tree peony.  Butter-yellow, pink shading, crimson flares.  Medium, single to semi-double bloom form.  Late.  USDA zone 2a and warmer.   Prof. Arthur Percy Saunders (1944).

8 favorite votes.  

Hybrid lactiflora.  Red.  Mild to strong fragrance.  Large, double bloom form.  Mid-to-late.  USDA zone 2a and warmer.  
Height: up to 35" (up to 90cm).   Ernest Flint Kelsey (1940).

8 favorite votes.  

Hybrid / Species crosses.  White, peach shading, green shading, violet veining.  Strong fragrance.  Medium to large, single bloom form.  Early.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).   Victor Lemoine (1905).

8 favorite votes.  

Herbaceous species, Species.  USDA zone 2a and warmer.  

8 favorite votes.  

Hybrid Lutea, Tree peony.  Red, yellow undertones.  Single to semi-double bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 43" (up to 110 cm).   Prof. Arthur Percy Saunders (1949).

8 favorite votes.  

Hybrid rockii, Tree peony.  White, dark purple flares.  Single to semi-double bloom form.  Early.  Height of 47" to 4' 11" (120 to 150 cm).   Dr. Joseph Rock (1926).

8 favorite votes.  

Hybrid / Species crosses.  Red.  Large, single bloom form.  Early-to-mid.  USDA zone 2a and warmer.  Height of 38" (95 cm).   Elizabeth Glasscock Falk (1956), Lyman D. Glasscock (1956).

8 favorite votes.  

Hybrid suffruticosa.   Unknown breeder (1896).

8 favorite votes.  

Hybrid lactiflora.  Dark red.  Semi-double to double bloom form.  Late midseason.   Edward Auten, Jr. (1931).

8 favorite votes.  

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 lactiflora.  Pink, ages to white .  None / no fragrance.  Single bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).   Auguste Dessert (1905).

7 favorite votes.  

Hybrid lactiflora.  Red.  Staminoids tipped yellow.  Single bloom form.  Late.  Height of up to 32" (up to 80 cm).   Kelway (and Son).

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.  

Tree peony.  Red, ages to purple.  Early.  USDA zone 2a and warmer.   Unknown Chinese Breeder(s).

7 favorite votes.  

Hybrid / Species crosses.  Crimson.  Mild fragrance.  Small, single bloom form.  Very early.  USDA zone 2a and warmer.  
Height: 20" to 22" (50 to 55cm).   Prof. Arthur Percy Saunders (1951).

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.  Light pink, cream center.  Large, double bloom form.  Late midseason.   William Henry Krekler (1958).

7 favorite votes.  

Intersectional Hybrid / Itoh.  Cream to peach, red flares.  Yellow stamens.  Single, cupped bloom form.  
Height: up to 34" (up to 85cm).   William J. Seidl (2009).

7 favorite votes.  

Hybrid suffruticosa, Tree peony.  Pink.  Cherry-pink.  Very large, double, ruffled bloom form.  USDA zone 2a and warmer.   Unknown Japanese Breeder(s) (1931).

7 favorite votes.  

Hybrid lactiflora.  Light pink, ages to cream .  Medium, double bloom form.  Midseason.  

7 favorite votes.