| Scientific Name: | Robinia pseudoacacia |
| Common Name: | black locust |
| Family Name: | Fabaceae |
| Origin: | Garden origin, U.S. - central, U.S. - northeast |
| Hardiness Zone: | Zone 4: (-34 to -29 °C) |
| Plant Type: | Tree - deciduous |
| Mature Size: | 10 - 15m x 7 - 10m (height x width) |
| Habit: | Arching, Open, Twiggy, Upright |
| Form: | Columnar, Oval - vertical |
| Texture: | Medium - fine |
| Landscape Uses: | Erosion control, Reclamation, Shade tree, Specimen plant, Street (boulevard tree), Summer interest, Tall background, Woodland margin |
| Exposure: | Full sun |
| Soil or Media: | Rocky or gravelly or dry, Well-drained |
| Leaves: | Compound, Alternate, Soft flexible, Pinnate venation, Glabrous, Odd-pinnate, Elliptic, Oblong, Ovate, Entire |
| Flowers: | Raceme, White, Purple, May-Jun |
| Fruit: | Legume, Purple, Brown, Black, Aug-Sep, (Persistent) |
| Key ID Features: | |
| Leaves pinnately compound, most 10-30 cm long x 5-10cm wide, (3-)7-15(-23) leaflets, most oblong, 2-4cm long x 1-1.5cm wide, spiny stipules; golden-yellow (cv. Frisia) or bronze-green (cv. Purple Robe); flowers 10-20 in pendant racemes, wisteria-like, 10-20cm long, flowers pea-like white or violet-purple, fragrant; legumes smooth, flat, 5-11cm long, purple-brown. Winter ID: bark longitudinally fissured on older trees or rarely smooth, twigs zig-zag, grooved, pair of spiny stipules 0.5-2cm long at (some) nodes, buds tiny, terminal bud absent. | |