Scientific Name:
Kerria japonica
Pronunciation:
KAIR-ee-uh juh-PON-ih-kuh
Common Name:
Japanese kerria
Family Name:
Rosaceae
Plant Type:
Shrub - deciduous
Key ID Features:
Twiggy, arching, deciduous shrub; leaves alternate, lanceolate, most 4-7cm long x 2-3cm wide, margin double serrate, with deep veins, petiole ~5mm long, stipules narrow; flowers bright yellow, 3-5cm wide, Apr.-May. Winter ID: stems slender, green (yellow-green in winter) and contrast with dark reddish-brown lower scales of the buds.
Habit:
Spreading
Form:
Round, Vase
Texture:
Medium
Mature Height:
2 - 3m
Mature Spread:
2 - 3m
Growth Rate:
Fast
Origin:
South Asia / India
Hardiness Rating:
Zone 5: (-29 to -23 °C)
Exposure:
Full sun, Part sun/part shade, Filtered shade
Soil/Growing Medium:
Well-drained
Water Use:
High, Moderate
Landscape Uses:
Hedge row, Mixed shrub border, Woodland margin
Additional Info:
Google. Most images are of K. ‘Pleniflora’ (numerous petals).
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Soft flexible, Pinnate venation
Surfaces:
Glabrous
Colour in Fall:
Yellow
Shapes:
Lanceolate
Apices:
Acuminate
Bases:
Cordate
Margins:
Double serrate
Inflorescence Type:
Flowers solitary
Flower Morphology:
Flowers perfect
Number Of Petals:
Variable
Corolla Shape:
Rotate/stellate
Ovary Position:
Inferior
Colour (petals):
Showy, Yellow
Flower Scent:
Sweet
Flower Time at Peak:
Apr, May
Fruit Type:
Achene, Follicle
Fruit Colour:
Dark-red, Brown
Fruiting Time:
Jun, Jul
Additional Info:
Not showy
Bark Morphology:
Smooth
Bark or Stem Colour:
Green
Leaf Bud Type:
Conical (long-pointed), Ovoid
Leaf Scar Shape:
Crescent shaped
Organ Modifications:
Stipule (leafy)
Propagation:
Greenwood cuttings, Division - above ground parts
Maintenance:
Medium
Pest Susceptibility:
Blight or needle cast, Canker or sap rot (Pest resistant, Disease resistant, Deer resistant)
Course(s):
- Level 3 Apprenticeship
Location(s):
- (CGW) Community Garden West
- (WDH) Wark-Dumais House : 179