Celtis occidentalis (Common Hackberry)


Botanical Information

FamilyCannabaceae (Ulmaceae)
GenusCeltis
Speciesoccidentalis
CategoryWoody
TypeTree (deciduous)
OriginQuebec to Manitoba, south to North Carolina, Alabama, Georgia and Oklahoma.
Pronunciation

Details

USDA Hardiness Zone3 - 9
USDA Hardiness Ref.
Canadian Hardiness Zone2
Canada Hardiness Ref.
RHS Hardiness ZoneH7
RHS Hardiness Ref.
Temperature (°C)-40
Temperature (°F)-40
Height20 m
Spread15 m
GrowthFast
Flowering PeriodMay

Description and Growing Information

General DescriptionA native North American tree with cork like bark that is very urban tolerant.
ShapeFine branch habit with a broad top with ascending arching branches.
LandscapeCity and courtyard gardens, urban landscapes, parks, streets, informal gardens, mass plantings, large properties, cottages or as a specimen.
PropagationSeed.
CultivationPrefers rich, moist soil but grows in dry, heavy, sandy and rocky soils. Tolerates wind, full sun, dry and alkaline soil conditions.
PestsWitches broom, leaf spots, powdery mildew. The leaves are prone in our Ontario environment to severe infestations of leaf galls.
Notable SpecimensWeldon Library, University of Western Ontario, London, Ontario, Canada. Joany's Woods, West Williams, Middlesex County, Ontario, Canada.
HabitatFlood plains, along roadsides, open fields and fence rows.
Bark/Stem DescriptionGrey in colour with corky warts or ridges.
Flower/Leaf Bud DescriptionSmall imbricate buds, 5 mm long, chestnut brown, ovate with sharp point.
Leaf DescriptionAlternate, simple, ovate leaves around 5 - 12.5 cm long.
Flower DescriptionPolygamo-monoecious staminate flowers.
Fruit DescriptionFleshy yellow fruit, borne on a 2.5 - 5 cm long pedicel that ripens in September.
Colour DescriptionDull green in summer turning yellow-green in autumn; not impressive.
Texture DescriptionMedium-coarse.

Photographs