Scientific Name:
Betula utilis
var.
jacquemontii
Pronunciation:
BET-you-luh YOU-till-iss variety jak-MON-tee-eye
Common Name:
Jacquemont birch
Family Name:
Betulaceae
Plant Type:
Tree - deciduous
Key ID Features:
Leaves alternate, ovate, most blades 8-10cm long x 4-5cm wide, 7-9 pairs of major veins (species has 10-14); margins serrate, petioles 2-3cm long; male catkins yellowish-brown, 7-12cm long when mature; female catkins on same tree, upright, 2-4cm long, green. Winter ID: exfoliating white bark (whitest of all birches), with orange underneath; lateral buds conical, 9-13mm long x 3-4mm wide; terminal immature male catkins about 3cm long x 4-7mm wide.
Habit:
Stiffly upright
Form:
Oval - vertical
Texture:
Medium
Mature Height:
10 - 15m
Mature Spread:
5 - 7m
Growth Rate:
Moderate
Origin:
South Asia / India
Hardiness Rating:
Zone 7: (-18 to -12 °C)
Exposure:
Full sun
Soil/Growing Medium:
Well-drained
Water Use:
Moderate
Landscape Uses:
Specimen plant
Additional Info:
Leaf Morphology:
Form:
Simple
Arrangement:
Alternate
Texture/Venation:
Soft flexible
Surfaces:
Glabrous
Shapes:
Ovate
Apices:
Acuminate, Acute
Bases:
Obtuse
Margins:
Serrate
Inflorescence Type:
Catkin (ament)
Flower Morphology:
Monoecious plant
Number Of Petals:
0
Colour (petals):
Not showy, Green-yellow
Flower Time at Peak:
Apr, May
Fruit Type:
Samara
Fruit Colour:
Brown
Fruiting Time:
Sep, Oct
Additional Info:
Female catkin release many tiny samaras
Bark Morphology:
Papery
Bark or Stem Colour:
White
Leaf Bud Type:
Conical (long-pointed)
Leaf Scar Shape:
Crescent shaped
Organ Modifications:
Ectomycorrhizae, Fibrous-like roots
Propagation:
Seed, Cuttings, Grafting
Maintenance:
High
Pest Susceptibility:
Aphids or adelgids, Beetles or weevils, Canker or sap rot, Dieback, Leafhopper or spittlebug, Stem borer insects (Disease resistant, Drought tolerant)
Specific Pests:
High susceptibility to bronze birch borer
