Hybrid lactiflora.  Dark red, yellow center.  Japanese (anemone, imperial) bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 18" (up to 45 cm).   Albert Niva (1999).

6 favorite votes.  

Hybrid Lutea, Tree peony.  Yellow.  Semi-double, ruffled bloom form.  Early-to-mid.  USDA zone 2a and warmer.  Height of 3' to 4' (90 to 120 cm).   Prof. Arthur Percy Saunders (1944).

6 favorite votes.  

Hybrid / Species crosses.  Light pink and white.  Double bloom form.  Early.  Height of up to 2' (up to 60 cm).   Unknown breeder.

6 favorite votes.  

Hybrid / Species crosses.   Prof. Arthur Percy Saunders (1952).

6 favorite votes.  

Hybrid / Species crosses.  Coral-red.  Double bloom form.  Early.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).   Mrs. Mary E.G. Freeborn (1943).

6 favorite votes.  

Hybrid lactiflora.  Purple - red.  Mild fragrance.  Small to medium, Japanese (anemone, imperial) bloom form.  Midseason.   Jacques Calot (1865).

6 favorite votes.  

Hybrid / Species crosses.  Light pink, white center.  Strong fragrance.  Semi-double bloom form.  Early-to-mid.  USDA zone 2a and warmer.  Height of 32" to 35" (80 to 90 cm).   Prof. Arthur Percy Saunders (1953).

6 favorite votes.  

Hybrid lactiflora.  White, cream undertones.  Mild fragrance.  Large, double, bomb, cupped bloom form.  Midseason.  Height of 28" to 30" (70 to 75 cm).   Carl G. Klehm (1959).

6 favorite votes.  

Hybrid lactiflora.  Dark red.  Double, bomb bloom form.  Midseason.  Height of 30" to 32" (75 to 80 cm).   Robert William Tischler (1999).

6 favorite votes.  

Hybrid suffruticosa.  

6 favorite votes.  

Hybrid / Species crosses.  Light yellow.  Moderate fragrance.  Single bloom form.  Height of up to 2' (up to 60 cm).   Eivind Hansen (2006).

6 favorite votes.  

Hybrid / Species crosses.  Pink, yellow center.  Pink bonnet.  Mild fragrance.  Large, Japanese (anemone, imperial) bloom form.  Late midseason.  USDA zone 2a and warmer.  Height of up to 3' (up to 90 cm).   Don Hollingsworth (1980).

6 favorite votes.  

Hybrid lactiflora.  Pink.  Large, double bloom form.  Late.  USDA zone 2a and warmer.  Height of 30" (75 cm).   Robert William Tischler (1967).

6 favorite votes.  

Hybrid lactiflora.  Deep pink, lighter center, white undertones.  Moderate fragrance.  Double, bomb bloom form.  Midseason.  USDA zone 2a and warmer.  Height of 2' to 3' (60 to 90 cm).   Myron D. Bigger (1961).

6 favorite votes.  

Hybrid / Species crosses.  Yellow.  Single bloom form.  Very early.  Height of up to 2' (up to 60 cm).   Prof. Arthur Percy Saunders (1940).

6 favorite votes.  

Hybrid lactiflora.  Red.  Medium, double bloom form.  Midseason.  Height of up to 35" (up to 90 cm).   Gilbert H. Wild & Son (1950).

6 favorite votes.  

Hybrid lactiflora.  Red.  Staminoids edged yellow.  Single, Japanese (anemone, imperial) bloom form.  Midseason.   S. Wóycicki (1977).

6 favorite votes.  

Hybrid lactiflora.   Dr. Frederick G. Brethour.

5 favorite votes.  

Tree peony.  Red.  Mild fragrance.  Crown bloom form.  USDA zone 2a and warmer.  Height of 5' (150 cm).  

5 favorite votes.  

Hybrid lactiflora.  Light pink or blush, ages to white .  Large, very double bloom form.  Late.  
Height: up to 35" (up to 90cm).   Francis H. Allison (1931).

5 favorite votes.  

Hybrid lactiflora.  Rose-pink.  Double, cupped bloom form.  Early.   John Richardson (1887).

5 favorite votes.  

Hybrid lactiflora.  Pink.  Prominent yellow stamens.  Semi-double bloom form.   Ernest Flint Kelsey (1936).

5 favorite votes.  

Hybrid rockii.  White, dark purple flares.  Moderate fragrance.  Double, ruffled bloom form.  Early.   Chen Dezhong (1992).

5 favorite votes.  

Hybrid lactiflora.  Pink to deep pink, darker streaks, stripes, flecks, cream streaks, stripes, flecks.  Cactus-dahlia-style.  None / no fragrance.  Small to medium bloom form.  Early-to-mid.  USDA zone 2a and warmer.  Height of 28" to 30" (70 to 75 cm).   William Henry Krekler (1999).

5 favorite votes.