Hybrid lactiflora.  Light pink, yellow center, ages to white .  Semi-double, cupped bloom form.  Early-to-mid.  USDA zone 2a and warmer.   Myron D. Bigger (1949).

4 favorite votes.  

Hybrid lactiflora.  White.  Faint red markings on reverse.  Moderate fragrance.  Large, double bloom form.  USDA zone 2a and warmer.  Height of up to 35" (up to 90 cm).   Christian Olson (1959).

4 favorite votes.  

Hybrid rockii, Hybrid suffruticosa.  White, dark purple flares.  Semi-double to double bloom form.  Height of 32" to 3' (80 to 90 cm).   Roger F. Anderson (1989).

4 favorite votes.  

Hybrid / Species crosses.  Red, golden-yellow center.  Single bloom form.  Very early.  Height of up to 31" (up to 80 cm).   Gilbert H. Wild & Son (1983).

4 favorite votes.  

Hybrid suffruticosa, Tree peony.  Cream, light purple highlights, dark purple flares.  Single bloom form.   Elwyn Chow (2005).

4 favorite votes.  

Hybrid lactiflora.   Kelway (and Son) (1915).

4 favorite votes.  

Tree peony.  Crimson, pink blending, light pink blending.  Very large, double, ruffled bloom form.  USDA zone 2a and warmer.   Goethals (1823).

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 lactiflora.  Red.  Staminoids tipped yellow.  Very large, double, Japanese (anemone, imperial) bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 35" (up to 90 cm).   Grant B. Babcock (1929).

4 favorite votes.  

Hybrid / Species crosses.  Rose-pink, lighter flares.  Single to semi-double bloom form.  Midseason.  USDA zone 2a and warmer.  Height of up to 35" (up to 90 cm).   Prof. Arthur Percy Saunders (1934).

4 favorite votes.  

Hybrid suffruticosa.  White, lilac shading, violet flares.  Medium, full bloom form.   Charles His (1842).

4 favorite votes.  

Hybrid / Species crosses.  Peach to buff.  Moderate fragrance.  Single, ruffled bloom form.  Early.  USDA zone 2a and warmer.  Height of 33" to 40" (85 to 100 cm).   Hubert A. Fischer (1969).

4 favorite votes.  

Hybrid lactiflora.  Cream.  Moderate, spicy fragrance.  Large, double, rose bloom form.  Mid-to-late.  USDA zone 2a and warmer.  Height of up to 32" (up to 80 cm).   Roy G. Klehm (1968).

4 favorite votes.  

Hybrid / Species crosses.  Dark red.  Large, semi-double bloom form.  Early-to-mid.   Lyman D. Glasscock (1964).

4 favorite votes.  

Herbaceous species, Species.  Pink.  Small to medium, single to semi-double bloom form.  Very early.  Height of 18" (45 cm).  

4 favorite votes.  

Hybrid lactiflora.  Deep pink.  Double bloom form.  Late midseason.   Hans Peter Sass (1937).

4 favorite votes.  

Hybrid lactiflora.  Deep pink.  Japanese (anemone, imperial) bloom form.  Midseason.  USDA zone 2a and warmer.   Robert William Tischler (1972).

4 favorite votes.  

Hybrid suffruticosa, Tree peony.  White.  Golden anthers.  Very large, semi-double to double bloom form.  Early.  USDA zone 2a and warmer.  
Height: 39" to 4'11" (100 to 150cm).   Unknown Japanese Breeder(s) (1889).

4 favorite votes.  

Hybrid / Species crosses.  Brilliant red.  Stamens visible.  Medium, semi-double to double, rose bloom form.  Early.  USDA zone 2a and warmer.  
Height: up to 19" (up to 50cm).   Edward Auten, Jr. (1936).

4 favorite votes.  

Hybrid suffruticosa.  Rose-pink.  None / no fragrance.  Semi-double bloom form.  Early.  Height of 3' to 4' (90 to 120 cm).   Roy G. Klehm (1987).

4 favorite votes.  

Hybrid suffruticosa.  Carmine-pink, purple undertones.  Some green petals.  Strong fragrance.  Medium, crown bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 4' (up to 120 cm).   Unknown Chinese Breeder(s).

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.  Scarlet or crimson.  Medium, single to semi-double bloom form.  Repeats.   Unknown Japanese Breeder(s) (1940).

4 favorite votes.  

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

4 favorite votes.