Hybrid lactiflora.  Violet-red.  Large, double, bomb bloom form.  Mid.   Philippe-Victor Verdier (1881).

7 favorite votes.  

Hybrid lactiflora.  White.  Strong, rose fragrance.  Medium to large, full bloom form.  Mid-to-late.  USDA zone 2a and warmer.  Height of 30" to 3' (75 to 90 cm).   Lyman Cousins (1946).

7 favorite votes.  

Hybrid suffruticosa, Tree peony.  White, blush shading.  Mild, citrus fragrance.  Large, double bloom form.  Midseason.  USDA zone 2a and warmer.  
Height: up to 8' (up to 245cm).  Width: up to 7' (up to 215cm). Unknown Chinese Breeder(s).

7 favorite votes.  

Tree peony.  Yellow.  Mild fragrance.  Mid.  USDA zone 2a and warmer.  

7 favorite votes.  

Hybrid / Species crosses.  Dark red.  Wine-red.  Semi-double to double, Japanese (anemone, imperial) bloom form.  Mid.  USDA zone 2a and warmer.  Height of up to 30" (up to 75 cm).   William Henry Krekler (1977).

7 favorite votes.  

Hybrid Lutea, Tree peony.  Pink, yellow undertones, deep pink veining, purple flares.  Moderate fragrance.  Single, ruffled bloom form.  Mid.  USDA zone 2a and warmer.  Height of up to 5' (up to 150 cm).   Prof. Arthur Percy Saunders (1948).

7 favorite votes.  

Hybrid Lutea, Tree peony.  Butter-yellow, red flares.  Strong, sweet fragrance.  Semi-double bloom form.  Early-to-mid.  USDA zone 2a and warmer.  Height of 5' (150 cm).   Prof. Arthur Percy Saunders (1952).

7 favorite votes.  

Hybrid lactiflora.  Dark red.  Double bloom form.  Late midseason.  USDA zone 2a and warmer.  Height of up to 32" (up to 80 cm).   Edward Auten, Jr. (1952).

7 favorite votes.  

Hybrid lactiflora.   Kelway (and Son).

7 favorite votes.  

Hybrid lactiflora.  Cream white, center straw yellow.  Very large, double, cupped, rose bloom form.  USDA zone 2a and warmer.   Victor Lemoine & Sons (1916).

7 favorite votes.  

Hybrid / Species crosses.  Red.  Yellow anthers, red stamens.  None to mild fragrance.  Very large, single bloom form.  Early.  
Height: up to 32" (up to 80cm).   Lyman D. Glasscock (1931).

7 favorite votes.  

Hybrid lactiflora.   Peter Barr.

7 favorite votes.  

Tree peony.  Pink.  Mild fragrance.  Mid.  USDA zone 2a and warmer.  

7 favorite votes.  

Hybrid lactiflora.  Light pink.  Large, double, rose bloom form.  Midseason.  USDA zone 2a and warmer.  Height of 26" to 32" (65 to 80 cm).   Carl G. Klehm (1952).

7 favorite votes.  

Hybrid / Species crosses.  Coral-pink, ages to cream .  Moderate fragrance.  Semi-double, cupped bloom form.  Early.  USDA zone 2a and warmer.  Height of up to 3' (up to 90 cm).   Roy G. Klehm (1972).

7 favorite votes.  

Hybrid lactiflora.  Pink, deep pink undertones.  Mild, sweet fragrance.  Double bloom form.  Late.  Height of up to 35" (up to 90 cm).   Don Hollingsworth (1973).

7 favorite votes.  

Hybrid lactiflora.  White, light pink highlights, light yellow center, several inner petals stained red.  Outer petals shaded pink, inner petals sulphur-yellow; elder flower fragrance.  Mild to strong fragrance.  Large, double, bomb bloom form.  Early.  
Height: up to 3' (up to 90cm).   Dr. John Livingstone (1808).

7 favorite votes.  

Hybrid / Species crosses.  Rose-pink, yellow center.  Small, single, cupped bloom form.  Very early.  Height of up to 14" (up to 35 cm).   William Henry Krekler (1985).

7 favorite votes.  

Hybrid suffruticosa.  Rose-pink, mauve highlights.  Mild fragrance.  Medium to large, double bloom form.  Early-to-mid.  USDA zone 6b and warmer.  Height of up to 4' 11" (up to 150 cm).   Unknown Chinese Breeder(s) (1795).

7 favorite votes.  

Hybrid lactiflora.  Ivory white with some blooms splashed with scarlet.  Double bloom form.  Early-to-mid.   Edward Auten, Jr. (1933).

7 favorite votes.  

Hybrid lactiflora.  White, light yellow center.  Pink bonnet.  Mild fragrance.  Double, bomb bloom form.  Midseason.  USDA zone 2a and warmer.  Height of 28" to 39" (70 to 100 cm).   Carl G. Klehm (1951).

7 favorite votes.  Average rating: EXCELLENT.  

Hybrid / Species crosses.  White.  Small to medium, single bloom form.  Late.  USDA zone 2a and warmer.  Height of up to 47" (up to 120 cm).   Prof. Arthur Percy Saunders (1947).

7 favorite votes.  

Hybrid rockii.  Deep pink, mauve shading, cream center, purple flares.  Mild fragrance.  Medium to large, single to semi-double, lotus bloom form.  Early-to-mid.   Chen Dezhong (1994).

6 favorite votes.  

Herbaceous species, Species.  Red to purple.  Medium, single bloom form.  Very early.  USDA zone 2a and warmer.  Height of 18" to 28" (45 to 70 cm).   Peter Simon Pallas (1785).

6 favorite votes.