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Scientific Name: Gleditsia triacanthos f. inermis
Pronunciation: gluh-DIT-see-uh try-uh-KAN-thus forma ih-NUR-miss
Common Name: thornless honey locust
Family Name: Fabaceae
Plant Type: Tree - deciduous
Key ID Features: Leaves pinnately or bipinnately compound, many small leaflets; bark is mottled gray. Winter ID: Buds very small; legume long, twisted, distinctive; branches zigzag with swollen nodes and gnarled leaf scars; crown open.
Course(s): AARB 1012, HORT 1155, Level 4 Apprenticeship, CLT Training

Habit: Irregular, Open, Spreading, Twiggy
Form: Irregular, Oval - vertical
Texture: Fine
Mature Size:
Height:15 - 22m
Spread:10 - 15m
Growth Rate:Fast
Origin: Canada - central, Canada - eastern, U.S. - central, U.S. - northeast
Hardiness Rating: Zone 4: (-34 to -29 C)
Exposure: Full sun
Soil/ Growing Medium: Well-drained
Landscape Uses: Fall interest, Specimen plant
Additional Info: Google. Most Images are of G. 'Sunburst' (bright green).
thornless honey locust
Leaf Morphology:
Form: Compound
Arrangement: Alternate
Texture/ Venation: Soft flexible
Compound Leaf: Even-pinnate
Colour in Fall: Yellow
Leaf(let) Terms:
Shapes: Lanceolate
Margins: Crenate, Serrulate

Inflorescence Type: Raceme
Flower Morphology:
Corolla Shape:Bilabiate
Colour (petals): Showy, White
Flower Scent: Sweet
Flower Time at Peak: May, Jun

Fruit Type: Legume
Fruit Colour: Brown
Fruiting Time: Sep, Oct
Additional Info: Showy

Bark Morphology: Lightly fissured
Bark or Stem Colour: Grey
Organ Modifications: Ectomycorrhizae

Propagation: Seed, Grafting
Plant Care:
Maintenance:Low maintenance plant
Pest Susceptibility: Deer resistant, Drought resistant, Fungal leaf spot, Galls, Heart rot, Scale insects, Diptera - true flies, Leafhopper or spittlebug, Canker or sap rot, Mildew, Rust
Specific Pests: Gall midge.
(BCE) Boulevard (Circular) Eastend
(TFL) Turf Field Lab
(TFLW) Turf Field Lab West
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