Hybrid lactiflora.  Red.  Large, very double bloom form.  Midseason.  USDA zone 2a and warmer.   Gilbert H. Wild & Son (1964).

4 favorite votes.  

Hybrid Lutea, Tree peony.  Yellow, crimson edges.  Single bloom form.  USDA zone 2a and warmer.   Prof. Arthur Percy Saunders (1948).

4 favorite votes.  

Hybrid Lutea, Tree peony.  Peach, red edges.  Moderate fragrance.  Semi-double, ruffled bloom form.  Mid.  USDA zone 2a and warmer.   Nassos Daphnis (1974).

4 favorite votes.  

Hybrid lactiflora.  Red.  Reverse of staminoids golden-yellow.  Japanese (anemone, imperial) bloom form.  USDA zone 2a and warmer.   Col. Jesse C. Nicholls (1941).

4 favorite votes.  

Hybrid lactiflora.  Red.  Medium, double bloom form.  Midseason.   Robert William Tischler (1999).

4 favorite votes.  

Hybrid / Species crosses.  Red.  Single bloom form.   William Henry Krekler (1977).

4 favorite votes.  

Hybrid lactiflora.  Deep pink, mauve shading.  Mild fragrance.  Large, double, rose bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).   Col. Jesse C. Nicholls (1964).

4 favorite votes.  

Hybrid / Species crosses.   Prof. Arthur Percy Saunders (1925).

4 favorite votes.  

Hybrid lactiflora.  White, pink center.  Mild fragrance.  Double, rose bloom form.  Mid-to-late.  Height of 30" to 34" (75 to 85 cm).   Roger F. Anderson (1987).

4 favorite votes.  

Hybrid lactiflora.   George E. Winchell (1941).

4 favorite votes.  

Hybrid lactiflora.   Auguste Dessert (1910).

4 favorite votes.  

Hybrid lactiflora.  Deep pink.  Double bloom form.  Height of up to 30" (up to 75 cm).   Myron D. Bigger (1961).

4 favorite votes.  

Hybrid lactiflora.  Pink, yellow center.  Single bloom form.  Early.  USDA zone 2a and warmer.  Height of 38" (95 cm).   George C. Thurlow (1922).

4 favorite votes.  

Hybrid suffruticosa.  White.   Unknown Japanese Breeder(s) (1919).

4 favorite votes.  

Tree peony.  Pink.  Large, semi-double bloom form.  Mid.  USDA zone 2a and warmer.   Unknown Japanese Breeder(s).

4 favorite votes.  

Herbaceous species, Species.  Crimson or purple.  Single bloom form.  Very early.  USDA zone 2a and warmer.  
Height: 2' to 32" (60 to 80cm).  

4 favorite votes.  

Hybrid rockii, Tree peony.  Light pink, white outer petals, purple flares.  Moderate fragrance.  Medium, semi-double bloom form.  Mid-to-late.  USDA zone 2a and warmer.  Height of up to 7' (up to 215 cm).   Chen Dezhong (1985).

4 favorite votes.  

Hybrid / Species crosses.  Rose-pink, darker streaks, stripes, flecks.  Prominent boss of golden stamens.  Moderate fragrance.  Large, single, cupped bloom form.  Very early.  USDA zone 2a and warmer.  
Height: up to 34" (up to 85cm).   Prof. Arthur Percy Saunders (1950).

4 favorite votes.  

Intersectional Hybrid / Itoh.  Deep pink, darker flares.  Medium to large, single bloom form.  Midseason.  Height of up to 39" (up to 100 cm).   Irene Tolomeo (2003).

4 favorite votes.  

Hybrid suffruticosa.  Light pink.  Large, semi-double to double, cupped bloom form.  Prolific.   Unknown Japanese Breeder(s) (1919).

4 favorite votes.  

Hybrid / Species crosses.  Scarlet.  Mild fragrance.  Small, single, cupped bloom form.  Early.  Height of up to 20" (up to 50 cm).   William Henry Krekler (1985).

4 favorite votes.  

Hybrid lactiflora.  White.  Green carpels.  Single, cupped bloom form.  USDA zone 2a and warmer.   Edward Auten, Jr. (1931).

4 favorite votes.  

Intersectional Hybrid / Itoh.  Yellow, red flares.  Moderate fragrance.  Semi-double bloom form.  Mid.  USDA zone 2a and warmer.  Height of 2' to 3' (60 to 90 cm).   Toichi Itoh (1948).

4 favorite votes.  

Hybrid suffruticosa, Tree peony.  Deep pink, red shading.  Mild fragrance.  Medium, double, crown bloom form.  Late.  USDA zone 2a and warmer.   Unknown Chinese Breeder(s).

4 favorite votes.