Hybrid suffruticosa, Tree peony.  Crimson, scarlet shading, white edges, yellow undertones.  Large, single to semi-double bloom form.   Unknown Japanese Breeder(s) (1893).

4 favorite votes.  

Hybrid lactiflora.  White.  Large bloom form.  USDA zone 2a and warmer.   Alonzo B. Franklin.

4 favorite votes.  

Hybrid lactiflora.  White, cream center.  Double bloom form.  Height of up to 2' (up to 60 cm).   Unknown breeder (1947).

4 favorite votes.  

Hybrid / Species crosses.  Red.  Moderate fragrance.  Large, double bloom form.  Mid-to-late.  USDA zone 2a and warmer.  Height of up to 28" (up to 70 cm).   Edward Auten, Jr. (1933).

4 favorite votes.  

Hybrid lactiflora.  Pink, silver(y) highlights.  Strong, sweet fragrance.  Large, double, flat bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 26" (up to 65 cm).   William Henry Krekler (1958).

4 favorite votes.  

Hybrid lactiflora.  Light pink, cream undertones, ages to white .  Strong, medicinal fragrance.  Large, single to semi-double, cupped, lotus bloom form.  Prolific, midseason.  
Height: up to 35" (up to 90cm).   Philippe-Victor Verdier (1892).

4 favorite votes.  

Hybrid lactiflora.   Donahue (1927).

4 favorite votes.  

Hybrid lactiflora.  Light pink.  Blush.  Double, rose bloom form.  Late.   Hans Peter Sass (1937).

4 favorite votes.  

Hybrid / Species crosses.  Red, yellow center.  Single bloom form.  Very early.  USDA zone 2a and warmer.  Height of up to 33" (up to 85 cm).   Edward Auten, Jr. (1941).

4 favorite votes.  

Hybrid lactiflora.  Dark red, purple shading.  Double bloom form.  USDA zone 2a and warmer.   Unknown Chinese Breeder(s).

4 favorite votes.  

Hybrid lactiflora.  Deep pink.  Very large, double bloom form.  Late midseason.   Eugene H. Lins (1945).

4 favorite votes.  

Hybrid lactiflora.  Pink.  Double bloom form.  USDA zone 2a and warmer.   Hans Peter Sass (1927).

4 favorite votes.  

Hybrid lactiflora.  Cherry-red, rose-red center.  Staminoids tipped yellow.  Moderate fragrance.  Single, cupped, Japanese (anemone, imperial) bloom form.  Late.  Height of up to 35" (up to 90 cm).   Kelway (and Son) (1930).

4 favorite votes.  

Hybrid rockii, Tree peony.  Mauve, white shading, black flares.  Mild fragrance.  Medium, single, lotus bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 7' (up to 215 cm).   Chen Dezhong (1985).

4 favorite votes.  

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

4 favorite votes.  

Hybrid lactiflora.  Deep pink.  Light red.  Large, single bloom form.  Height of up to 3' (up to 90 cm).   William Henry Krekler (1978).

4 favorite votes.  

Hybrid lactiflora.  White.  Double bloom form.  USDA zone 2a and warmer.   Archie M. Brand (1933).

4 favorite votes.  

Hybrid suffruticosa, Tree peony.  Rose-pink, lilac shading, purple flares.  Mild, rose fragrance.  Very large, semi-double to double bloom form.  Height of up to 8' (up to 245 cm).  Width of up to 10' (up to 305 cm). Unknown Chinese Breeder(s) (1789).

4 favorite votes.  

Hybrid / Species crosses.  Light pink, ages to lighter .  Large, semi-double bloom form.  Early-to-early mid.  Height of up to 40" (up to 100 cm).   William J. Seidl (2005).

4 favorite votes.  

Hybrid lactiflora.  White.  Mild to strong, rose fragrance.  Full bloom form.  Early.   Edward Auten, Jr. (1933).

4 favorite votes.  

Hybrid lactiflora.   Berneche (1932).

4 favorite votes.  

Hybrid lactiflora.  Lavender - pink.  Strong fragrance.  Large, Japanese (anemone, imperial) bloom form.  Mid.  USDA zone 2a and warmer.  Height of up to 32" (up to 80 cm).   William Henry Krekler (1965).

4 favorite votes.  

Hybrid suffruticosa.   Baumann frères / Gebrüder Baumann (1836).

4 favorite votes.  

Hybrid lactiflora.  Deep pink, yellow center.  Small, Japanese (anemone, imperial) bloom form.  Midseason.   Grant B. Babcock (1929).

4 favorite votes.