Details of...
Scientific Name: Ostrya virginiana
Pronunciation: os-TREE-a vur-jin-ee-AY-nuh
Common Name: American hophornbeam, ironwood
Family Name: Betulaceae
Plant Type: Tree - deciduous
Key ID Features: Leaves alternate, ovate to elliptical, serrated margins; female catkins papery and cone-like; fruit with 10-20 nutlets per sac-like bract (involcre). Winter ID: strongly divergent winter buds, terminal absent, scales striate.
Course(s): HORT 2355

Habit: Upright
Form: Oval - horizontal, Round
Texture: Medium - coarse
Mature Size:
Height:15 - 22m
Spread:7 - 10m
Growth Rate:Slow
Origin: U.S. - northeast (Cape Breton to Ontario, Minnesota south to Florida)
Hardiness Rating: Zone 3: (-40 to -34 C)
Exposure: Full sun, Part sun/part shade
Soil/ Growing Medium: Well-drained
Water Use: Low
Landscape Uses: Accent plant, Native planting, Specimen plant, Street (boulevard tree), Summer interest, Winter interest
Additional Info: Google
American hophornbeam, ironwood
Leaf Morphology: Glossary
Form: Simple
Arrangement: Alternate
Texture/ Venation: Heavily veined, Pinnate venation, Soft flexible
Surfaces: Pubescent
Colour in Fall: Yellow
Leaf(let) Terms:
Shapes: Elliptic, Ovate
Apices: Acuminate
Bases: Cordate, Rounded
Margins: Double serrate

Inflorescence Type: Catkin (ament)
Flower Morphology:Monoecious plant
Number of Petals:0
Colour (petals): Showy, Green-yellow, Brown
Flower Time at Peak: Apr, Dec
Additional Info: male catkins usually grouped n 3s, visible throughout winter; female flowers visible in April

Fruit Type: Nut
Fruit Colour: Green-yellow, Brown
Fruiting Time: Oct
Additional Info: Showy, Persistent, Nutlets 3-5 mm enclosed in a papery involucre up to 2 cm long x 1 cm wide; caution when handling: hairs on fruits get stuck on fingers and skin

Bark or Stem Colour: Dark Grey, Brown
Additional Info:Bark broken into narrow longitudinal 'strips'
Organ Modifications: Ectomycorrhizae

Propagation: Seed
Plant Care:
Maintenance:Low maintenance plant
Pest Susceptibility: Pest resistant, Disease resistant, Deer resistant, Drought resistant
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