Hybrid rockii, Tree peony.  Violet-red, dark purple flares.  Variable bloom forms.  Mild to strong fragrance.  Medium to large, semi-double to double, ruffled bloom form.  Prolific.  
Height: up to 7' (up to 215cm).  Width: up to 7' (up to 215cm).

Hybrid rockii, Tree peony.  Lilac-pink.  Notched petals.  Large, very double, ruffled bloom form.  

Hybrid rockii, Tree peony.  Cherry-red, darker flares.  Strong fragrance.  Large, rose bloom form.  Early.  
Height: up to 4' (up to 120cm).  Width: up to 42" (up to 105cm).

Hybrid rockii, Tree peony.  Blush or white, violet-red flares.  Golden stamens.  Strong fragrance.  Single to semi-double bloom form.  
Height: up to 7' (up to 215cm).  Width: up to 6' (up to 185cm).

Hybrid suffruticosa, Tree peony.  White.  Pale gold stamens.  Very large, semi-double bloom form.  
Height: up to 6' (up to 185cm).  Width: up to 6' (up to 185cm).

Hybrid rockii, Tree peony.  Lavender or lilac-pink, dark purple flares.  Medium, semi-double to double, Japanese (anemone, imperial) bloom form.  Midseason.  

Hybrid rockii, Tree peony.  Dark red or dark purple, darker flares.  Mild to strong, sweet fragrance.  Large, double bloom form.  
Height: up to 6' (up to 185cm).  Width: up to 5' (up to 150cm).

Tree peony.  Scarlet.  Golden stamens.  Large bloom form.  Prolific, Early.  

Tree peony.  Violet-red.  Large, very double bloom form.  
Height: up to 3" (up to 8cm).  

Tree peony.  Seashell-pink.  Large, semi-double to double, ruffled bloom form.  Prolific.  
Height: 5" to 6" (13 to 15cm).  

Hybrid rockii, Tree peony.  Dark red, darker flares.  Gold stamens, notched petals.  Mild to strong fragrance.  Large, semi-double to double bloom form.  
Height: 6' to 8' (185 to 245cm).  

Hybrid suffruticosa, Tree peony.  Light yellow or cream, blush shading, light green shading.  Very double, crown, ruffled bloom form.  Prolific, Midseason.  

Hybrid suffruticosa, Tree peony.  Purple - red, violet shading.  Large, double, rose, ruffled bloom form.  Midseason.  
Height: 4' to 5' (120 to 150cm).  Width: 3' to 4' (90 to 120cm).

Hybrid suffruticosa, Tree peony.  Light yellow or cream.  Mild to strong fragrance.  Very large, very double, bomb, ruffled bloom form.  

Hybrid rockii, Tree peony.  Fuchsia / magenta, violet flares.  Golden stamens.  Medium, semi-double to double, ruffled bloom form.  

Hybrid rockii, Tree peony.  White, dark purple flares.  Large, very double, ruffled bloom form.  

Hybrid rockii, Tree peony.  White, dark purple flares.  Yellow-green stamens.  Large, semi-double to double bloom form.  

Hybrid rockii, Tree peony.  Rose-pink, rose-red flares.  Golden yellow anthers.  Mild fragrance.  Medium, semi-double, ruffled bloom form.  Midseason.  

Hybrid rockii, Tree peony.  White, violet-red flares.  Mild to strong fragrance.  Large, very double bloom form.  Midseason.  
Height: up to 7' (up to 215cm).  Width: up to 4' (up to 120cm).

Hybrid rockii, Tree peony.  Carmine-pink, dark purple flares.  Golden yellow stamens.  Medium, single to semi-double, lotus bloom form.  Midseason.