Scientific Name:
Berberis
x
gladwynensis
'William Penn'
Pronunciation:
BUR-bur-iss ex glad-win-EN-sis
Common Name:
William Penn barberry
Family Name:
Berberidaceae
Plant Type:
Broadleaf evergreen
Key ID Features:
Evergreen spiny shrub to 1.3m tall, branches somewhat arching, mound forming habit; leaves whorled, most blade elliptical, sometimes of differing sizes up to 2-5(-7)cm long x 1.5-2.7cm wide, gark green, turning bronze-red in fall-winter; margins spiny with 3-9 points per side; three-pointed, spiny stipule per node with each point 15-20(-27mm) long (B. julianae may have even longer spines).
Habit:
Arching, Dense, Twiggy, Upright
Form:
Mounded, Oval - horizontal
Texture:
Medium
Mature Height:
0.7 - 1.3m
Mature Spread:
1.0 - 1.5m
Growth Rate:
Moderate
Origin:
Garden origin (B. verruculosa x B. gagnepainii)
Hardiness Rating:
Zone 5: (-29 to -23 °C)
Exposure:
Full sun, Part sun/part shade
Soil/Growing Medium:
Rocky or gravelly or dry, Well-drained
Water Use:
Low
Landscape Uses:
Attract birds, Fall interest, Filler, Hedge row, Mixed shrub border, Security/barrier, Sheared hedge, Specimen plant, Spring interest, Winter interest
Additional Info:
Leaf Morphology:
Form:
Simple
Arrangement:
Whorled
Texture/Venation:
Leathery
Surfaces:
Glabrous, Lustrous
Colour in Summer:
Dark-green
Colour in Fall:
Dark-green, Bronze
Shapes:
Elliptic
Apices:
Acute, Aristate, Mucronate
Bases:
Attenuate, Cuneate
Margins:
Spinose
Additional Info:
3 to 10cm long
Inflorescence Type:
Flowers clustered, Floriferous
Flower Morphology:
Flowers perfect
Number Of Petals:
6
Corolla Shape:
Campanulate
Ovary Position:
Superior
Colour (petals):
Showy, Yellow
Flower Time at Peak:
Apr, May
Additional Info:
each flower to 1.5cm wide
Fruit Type:
Berry (true)
Fruit Colour:
Purple, Black (ovoid fruit to 15mm long)
Fruiting Time:
Sep, Oct
Additional Info:
Showy, Persistent
Bark or Stem Colour:
Brown
Organ Modifications:
Stipule, pointy spines
Propagation:
Seed, Hardwood cuttings, Grafting
Maintenance:
Low
Pest Susceptibility:
Dieback, Fungal leaf spot, Mites, Root rot, Rust, Scale insects (Pest resistant, Disease resistant, Deer resistant, Rabbit resistant, Drought tolerant)
