| Vachellia cornigera, Vachellia collinsii, Vachellia tortuosa, Acacia glaucoptera, Vachellia horrida|Vachellia sphaerocephala Wikipedia
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. This tree is endemic to Mexico.