Scientific Name:
Pinus densiflora
Pronunciation:
PYE-nus den-sih-FLORE-uh
Common Name:
Japanese red pine
Family Name:
Pinaceae
Plant Type:
Conifer
Key ID Features:
Needles 2 per fascicle, 8-12cm long x 0.7-1.2mm wide, margins rough, stomatal lines on all surfaces; female cones conical to ovate, 4-7cm long, in whorls of 2-5 at branch nodes, remaining closed and attached for several years, seed with wing 10-17mm long; bark partially red to orange, exfoliating. Conifers.org
Habit:
Dense, Irregular, Spreading, Upright
Form:
Irregular, Pyramidal - widely
Texture:
Medium - fine
Mature Height:
10 - 15m
Mature Spread:
5 - 7m
Growth Rate:
Moderate
Origin:
S.E. Asia / Japan / China
Hardiness Rating:
Zone 5: (-29 to -23 °C)
Exposure:
Full sun
Soil/Growing Medium:
Well-drained
Landscape Uses:
Accent plant, Shade tree, Specimen plant, Tall background, Wind break, Winter interest, Woodland margin
Additional Info:
Google. Cultivars shown or on campus may include P. 'Low Glow' (dense, compact, rounded), P. 'Oculus Draconis' (variegated needles), P. 'Pendula' (weeping), and P. 'Umbraculifera' (globose to broad-rounded crown when mature, dense, fastigiate branching). Compare to Japanese black pine.
Leaf Morphology:
Form:
Needle-like
Arrangement:
Fascicles
Texture/Venation:
Soft flexible
Surfaces:
Glabrous
Colour in Summer:
Dark-green
Colour in Fall:
Dark-green
Shapes:
Acicular
Apices:
Acute
Bases:
Truncate
Margins:
Entire
Inflorescence Type:
n/a (male cone)
Flower Morphology:
Monoecious plant
Colour (petals):
Male cone, No flowers, Yellow
Flower Time at Peak:
Apr, May
Fruit Type:
Cone (winged seeds)
Fruit Colour:
Brown
Fruiting Time:
Aug, Sep, Oct
Additional Info:
Persistent,
Bark Morphology:
Showy, Exfoliating, Plated, Lightly fissured
Bark or Stem Colour:
Orange, Red, Tan, Brown
Organ Modifications:
Ectomycorrhizae
Maintenance:
Low
Pest Susceptibility:
Dieback, Heart rot, Rust, Scale insects, Stem borer insects, Wood deformity (Deer resistant, Drought tolerant)
Course(s):
- HORT 2355
Location(s):
- (AGB) Acer Griseum Bed : dwarf cv. Low Glow
- (GAZ) GAZebo
- (GAZN) GAZebo North
- (ONE) Overpass North side East : cv. Umbraculifera