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Botanical Name
Robinia pseudoacacia

Details

Black locust, also called false acacia, is a fast-growing deciduous hardwood of the legume family. It is native only to two small parts of the eastern United States, around the Appalachians and the Ozark and Ouachita uplands, but has been planted and naturalised across temperate North America, Europe, Asia and Africa, and in places is counted invasive. Its leaves are divided into many rounded leaflets, young growth carries short spines in pairs, and in May or June it hangs out drooping clusters of fragrant white pea-flowers, the source of the honey sold in Europe as acacia honey. English colonists found it at Jamestown in 1607 and built houses from its timber, and the genus is named for Jean Robin, a royal gardener in France, who is said to have planted one in Paris around 1600. Its very hard, rot-resistant wood was long valued for ships' trenails, fence posts and firewood. Kynes writes that locust trees were thought somewhat sinister for their thorns and for the dense witches'-broom growths taken as signs of bewitchment, and that New England legend has some of those condemned at Salem hanged on a locust. In magic it is used for protection, binding, love, fidelity and strength.

Caution

Kynes warns that black locust is poisonous if eaten. Its bark, leaves and wood are poisonous to people and livestock; the main toxin, the toxalbumin robin, loses its toxicity when heated. Horses that eat the plant can show colic, weakness and disturbed heart rhythm about an hour later and need a vet at once.

References

#1#2#3

Correspondences

Elements
Earth, Water
Celestial Bodies
None recorded
Zodiac Signs
Aries
Colours
None recorded
Deities
Cerridwen (Welsh), Hecate (Greek), Morrigan (Irish)

Folk Names

  • False Acacia
  • Locust Tree
  • Yellow Locust

Categories

  • Binding
  • Fidelity
  • Harmony
  • Love
  • Protection
  • Strength

Substitutes

No substitutes recorded.

Forms

Pod

The flat, smooth pods, five to ten centimetres long, usually hold four to eight seeds, which ripen in late autumn and stay on the tree until early spring. Kynes dries a few large seedpods to shake as rattles in dark-moon rituals.

References

#4#5

Thorn

On black locust the thorns are short spines, up to about two centimetres, set in pairs beside each leaf base, mostly on young trees and root suckers. Kynes uses locust thorns for protection: three laid on a windowsill pointing towards a threat, or three tucked under the front doormat to keep negative energy out of the home.

References

#6#7

Wood

Caution

Sawdust and shavings from the timber may bring on contact dermatitis in people sensitive to them.

References

#8#9

References

Notes

  1. Grieve, "Acacia (false)."
  2. Kynes, Witches' Encyclopedia of Magical, under "Locust".
  3. Wikipedia, under "Robinia pseudoacacia."
  4. Kynes, Witches' Encyclopedia of Magical, under "Locust".
  5. Wikipedia, under "Robinia pseudoacacia."
  6. Kynes, Witches' Encyclopedia of Magical, under "Locust".
  7. Wikipedia, under "Robinia pseudoacacia."
  8. Grieve, "Acacia (false)."
  9. Wikipedia, under "Robinia pseudoacacia."

Bibliography

  • Grieve, M. "Acacia (false)." A Modern Herbal. Accessed October 11, 2026. https://www.botanical.com/botanical/mgmh/a/acaci005.html. Open the Source (opens in a new tab)18
  • Kynes, Sandra. The Witches' Encyclopedia of Magical Plants: History, Folklore, Correspondences, and Spells. Woodbury, MN: Llewellyn Publications, 2024. (EPUB.)246
  • Wikipedia, under "Robinia pseudoacacia." Accessed October 11, 2026. https://en.wikipedia.org/w/index.php?title=Robinia_pseudoacacia&oldid=1377028869. Open the Source (opens in a new tab)3579