Vachellia sphaerocephala

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Bull's Horn Thorn
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Fabales
Family: Fabaceae
Genus: Vachellia
Species: V. sphaerocephala
Binomial name
Vachellia sphaerocephala
(Schltdl. & Cham.) Seigler & Ebinger[1]
  • Acacia sphaerocephala Schltdl. & Cham.

Vachellia sphaerocephala (bull's horn thorn or bee wattle) is a plant of the family Fabaceae. The name comes from the shape of the thorns which do indeed resemble the horns of a bull. The tree has a strong, symbiotic relationship with a species of stinging ant, Pseudomyrmex ferruginea.[2] This tree is endemic to Mexico.[3]


  1. ^ Seigler DS, Ebinger JE. (2005). "New combinations in the genus Vachellia (Fabaceae: Mimosoideae) from the New World.". Phytologia. 87 (3): 139–78. 
  2. ^ Whitney. H.M. and B.J. Glover. 2007. Coevolution: Plant–Insect. Encyclopedia of Life Sciences, 1–7
  3. ^ Encyclopedia of Life