Scientific Name: Gleditsia triacanthos f. inermis
Common Name: thornless honey locust
Family Name: Fabaceae
Origin: Canada - central, Canada - eastern, U.S. - central, U.S. - northeast
Hardiness Zone: Zone 4: (-34 to -29 °C)
Plant Type: Tree - deciduous
Mature Size: 15 - 22m x 10 - 15m (height x width)
Habit: Irregular, Open, Spreading, Twiggy
Form: Irregular, Oval - vertical
Texture: Fine
Landscape Uses: Fall interest, Specimen plant
Exposure: Full sun
Soil or Media: Well-drained
Leaves: Compound, Alternate, Soft flexible, Even-pinnate, Lanceolate, Crenate, Serrulate
Flowers: Raceme, White, May-Jun
Fruit: Legume, Brown, Sep-Oct, (Persistent)
Key ID Features:
Leaves alternate, pinnately or bipinnately compound, 15-20cm long, each with >20 small leaflets that mostly enlarge to 2-4cm long x 1-1.5cm wide. Winter ID: crown open; bark mottled gray; branches shiny, zigzag with swollen nodes (some with short spurs); buds very small, clustered of about 5 per node, no terminal bud; leaf scars gnarled; legumes 15-20cm long x 3cm wide, flattened, twisted, dark brown (missing on some cultivars).