Scientific Name:
Fraxinus pennsylvanica
cvs.
Pronunciation:
FRAK-si-nus pen-sil-VAN-ih-kuh
Common Name:
green ash
Family Name:
Oleaceae
Plant Type:
Tree - deciduous
Key ID Features:
Tree oval crown; leaves opposite, pinnately compound, leaflets 5-7(-9), most ovate-lanceolate, 5-12cm long x 2-5cm wide, glossy, olive-green; flowers purple, Apr-May; samara 2.5-5cm long x 2-6mm wide (absent on some cultivars). Winter ID: the rounded terminal bud touch the base of the first lateral buds, velvety dark brown; leaf scar crescent shaped with notch for bud; numerous tiny bundle scars form a crescent shape.
Habit:
Spreading, Upright
Form:
Oval - vertical
Texture:
Medium
Mature Height:
10 - 15m
Mature Spread:
10 - 15m
Growth Rate:
Moderate
Origin:
Canada - central, Garden origin, U.S. - northeast
Hardiness Rating:
Zone 3: (-40 to -34 °C)
Exposure:
Full sun
Soil/Growing Medium:
Well-drained
Water Use:
Moderate
Landscape Uses:
Fall interest, Shade tree, Specimen plant, Street (boulevard tree), Tall background
Additional Info:
Google. Cultivars shown or on campus may include F. 'Patmore', F. 'Cimmzam' (Cimmaron), and P. 'Johnson' (compact form with small leaves).
Leaf Morphology:
Form:
Compound
Arrangement:
Opposite
Texture/Venation:
Soft flexible, Pinnate venation
Surfaces:
Lustrous
Compound Leaf:
Odd-pinnate, Leaflets stalked
Colour in Summer:
Green, Dark-green
Colour in Fall:
Orange, Red
Shapes:
Lanceolate
Apices:
Acuminate
Bases:
Cuneate
Margins:
Serrate
Additional Info:
Spectacular fall colour
Inflorescence Type:
Panicle
Flower Morphology:
Dioecious plant
Number Of Petals:
0
Ovary Position:
Superior
Colour (petals):
Not showy, Green-yellow, Dark-red
Flower Time at Peak:
Apr, May
Fruit Type:
Samara
Fruit Colour:
Green, Brown
Fruiting Time:
Jul, Aug
Additional Info:
Persistent, Male cultivar that does not bear fruit
Bark Morphology:
Deeply fissured
Bark or Stem Colour:
Grey
Leaf Bud Type:
Ovoid
Leaf Scar Shape:
Crescent shaped
Pest Susceptibility:
Anthracnose, Stem borer insects (Disease resistant, Drought tolerant)
Specific Pests:
Course(s):
- HORT 2355
Location(s):
- (BUG) BUG garden : cv. Johnson
- (CGW) Community Garden West : cv. Patmore
- (ENA) Eastern North American planting : 240, 249 cv. Patmore
- (WDH) Wark-Dumais House : cv. Cimmzam q.4