Hybrid lactiflora.  Light pink.  Semi-double to double bloom form.  USDA zone 2a and warmer.   Archie M. Brand (1933).

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 lactiflora.  Red.  Height of up to 42" (up to 105 cm).   William Henry Krekler (1979).

6 favorite votes.  

Hybrid lactiflora.  Light pink, cream center, ages to white .  Strong fragrance.  Large, double, rose bloom form.  Mid-to-late.  USDA zone 2a and warmer.  Height of 35" (90 cm).   Kelway (and Son) (1889).

6 favorite votes.  

Hybrid lactiflora.   Lyman D. Glasscock (1928).

6 favorite votes.  

Tree peony.  Purple - red, darker undertones.  Strong fragrance.  Crown bloom form.  Very early.  USDA zone 2a and warmer.  

6 favorite votes.  

Hybrid / Species crosses.  White, light pink shading, dark red center.   William J. Seidl (2001).

6 favorite votes.  

Hybrid lactiflora.  Pink, lavender shading.  Opens well.  Mild to strong, rose fragrance.  Large, double bloom form.  Late.   Edward Auten, Jr. (1934).

6 favorite votes.  

Hybrid / Species crosses.   Julian L. Janus.

6 favorite votes.  

Hybrid lactiflora.  Seashell-pink, darker shading.  Large, full, rose bloom form.  Prolific, Late.   D.M. Andrews (1923).

6 favorite votes.  

Hybrid suffruticosa.  Pink.  Golden-yellow collar.  Moderate fragrance.  Double bloom form.   Charles His (1851).

6 favorite votes.  

Hybrid suffruticosa.  Light pink.  Small, double bloom form.  Late midseason.   Unknown Japanese Breeder(s) (1961).

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.  Dark red, violet-red shading.  Double bloom form.  Midseason.  Height of 31" to 35" (80 to 90 cm).   Unknown breeder (1930).

6 favorite votes.  

Hybrid lactiflora.  Pink.  None / no fragrance.  Large, double bloom form.  Midseason.  Height of up to 28" (up to 70 cm).   Robert William Tischler (1987).

6 favorite votes.  

Hybrid / Species crosses.  Light pink, white stripes, pink stripes.  Double bloom form.  Early.   Unknown (1856).

6 favorite votes.  

Species, Tree peony.  Dark red, brown undertones.  Small, single bloom form.  USDA zone 2a and warmer.  Height of up to 39" (up to 100 cm).  

6 favorite votes.  

Hybrid suffruticosa, Tree peony.  White, violet flares, lilac shading.  Medium, double bloom form.  USDA zone 2a and warmer.   André Leroy (1801-1875) (1846).

6 favorite votes.  

Hybrid lactiflora.  Carmine-pink, pink center.  Japanese (anemone, imperial) bloom form.  Midseason.   Auguste Dessert (1899).

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 lactiflora.  Seashell-pink.  Medium, double bloom form.  Late.  Height of 35" to 39" (90 to 100 cm).   E. H. Krelage & Zoon (1910).

6 favorite votes.  

Hybrid lactiflora.  Cream.  Mild fragrance.  Double bloom form.  Midseason.  Height of up to 34" (up to 85 cm).   William Henry Krekler (1993).

6 favorite votes.  

Hybrid lactiflora.  White.  Small, single, cupped bloom form.  Early.  Height of up to 15" (up to 40 cm).   Roy G. Klehm (1984).

6 favorite votes.  

Hybrid lactiflora.  Rose-pink, ages to lighter .  Mild fragrance.  Medium to large, single bloom form.  Early.  Height of up to 30" (up to 75 cm).   Roy G. Klehm (1995).

6 favorite votes.