Hybrid lactiflora.  White, light pink highlights.  Double, rose bloom form.  USDA zone 2a and warmer.   Col. Jesse C. Nicholls (1937).

6 favorite votes.  

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 / 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 suffruticosa.  Lilac - pink.  Single bloom form.   Auguste Dessert (1909).

6 favorite votes.  

Intersectional Hybrid / Itoh.  Yellow, lighter edges, red flares.  Medium, single to semi-double bloom form.  Midseason.  USDA zone 2a and warmer.  Height of 18" to 2' (45 to 60 cm).   Don Hollingsworth (1974).

6 favorite votes.  

Hybrid lactiflora.  Purple - violet.  Large, double bloom form.  Late.   François-Félix Crousse (1840-1925) (1879).

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 Lutea, Tree peony.  Dark red, dark brown shading.  Large, single to semi-double bloom form.  USDA zone 2a and warmer.   Prof. Arthur Percy Saunders (1941).

6 favorite votes.  

Hybrid lactiflora.   Ernest Flint Kelsey (1938).

6 favorite votes.  

Hybrid lactiflora.   Julian L. Janus.

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 lactiflora, Unknown.  Cream, light pink shading.  Moderate fragrance.  Double bloom form.  Mid-to-late.  USDA zone 2a and warmer.  Height of up to 30" (up to 75 cm).   Roy G. Klehm (1993).

6 favorite votes.  

Hybrid lactiflora.  White.  Staminoids persist after outer petals fall.  Japanese (anemone, imperial) bloom form.  Late.   Arthur L. Murawska (1944).

6 favorite votes.  

Hybrid lactiflora.   Peter Barr (1899).

6 favorite votes.  

Hybrid / Species crosses.  Red.  Semi-double to double bloom form.  Early.  USDA zone 2a and warmer.   Prof. Arthur Percy Saunders (1950).

6 favorite votes.  

Hybrid lactiflora.  White, lemon-yellow center.  Light pink bonnet (15-30 petals).  Strong fragrance.  Medium, double, bomb bloom form.  Early-to-early mid.  USDA zone 2a and warmer.  Height of 30" to 35" (75 to 90 cm).   Carl G. Klehm (1970).

6 favorite votes.  

Hybrid lactiflora.  Pink.  Large, single, cupped bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 43" (up to 110 cm).   Auguste Dessert (1902).

6 favorite votes.  

Hybrid suffruticosa, Tree peony.  White.  Mild fragrance.  Large, semi-double to double bloom form.  Height of 2' to 35" (60 to 90 cm).   Unknown Japanese Breeder(s) (1931).

6 favorite votes.  

Hybrid lactiflora.  Rose-red.  Strong fragrance.  Double, flat bloom form.  Late.  USDA zone 2a and warmer.  Height of 30" to 3' (75 to 90 cm).   Walter Marx (1965).

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.  Dark red, brown shading.  Staminoids tipped yellow.  Single, Japanese (anemone, imperial) bloom form.  USDA zone 2a and warmer.  Height of up to 3' (up to 90 cm).   Myron D. Bigger (1959).

6 favorite votes.  

Species, Tree peony.  Large, cupped bloom form.  USDA zone 4b through 9b.  Height of 3' to 6' (90 to 185 cm).  Width of 3' to 6' (90 to 185 cm).

6 favorite votes.  

Hybrid lactiflora.  Light pink, yellow center.  Japanese (anemone, imperial) bloom form.  USDA zone 2a and warmer.   Unknown Japanese Breeder(s) (1909).

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.