Bull Horn Acacia
Bull horn acacia is a common name for several plants in '' Vachellia'' with large thorns resembling a bull's horns: *''Vachellia collinsii'', native to Central America and parts of Africa *''Vachellia cornigera'', native to Mexico and Central America *''Vachellia sphaerocephala ''Vachellia sphaerocephala'', the bull's horn thorn or bee wattle, is a plant species in 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 ...

Vachellia
''Vachellia'' is a genus of flowering plants in the legume family, Fabaceae, commonly known as thorn trees or acacias. It belongs to the subfamily Mimosoideae. Its species were considered members of genus ''Acacia'' until 2009. ''Vachellia'' can be distinguished from other acacias by its capitate inflorescences and spinescent stipules. Before discovery of the New World, Europeans in the Mediterranean region were familiar with several species of ''Vachellia'', which they knew as sources of medicine, and had names for them that they inherited from the Greeks and Romans. The wide-ranging genus occurs in a variety of open, tropical to subtropical habitats, and is locally dominant. In parts of Africa, ''Vachellia'' species are shaped progressively by grazing animals of increasing size and height, such as gazelle, gerenuk, and giraffe. The genus in Africa has thus developed thorns in defence against such herbivory. Nomenclature By 2005, taxonomists had decided that ''Acacia sensu lato' ...
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Vachellia Collinsii
''Vachellia collinsii'' is a species of flowering plant native to Central America and parts of Africa. It grows in secondary succession in seasonally dry ecosystems in southern Central America, with preferences to Savannah-like climate. The Vachellia collinsii, also known as acacia collinsii, can grow upwards of 40 feet tall. The tree grows relatively straight with thorns generously distributed across the branches. The small, pinnate leaves grow opposite from each other similar to a Mimosa. Acacia’s like full sun and most likely would not be found among the trophic understory common to that of jungles. Acacia’s can thrive in higher humidities, such as above 70% humidity. The Acacia collinsii has a wide distribution across the world compared to other acacias as well as a wide ecological distribution as it can grow at sea level to 1000 meters elevation. Since this species has a diverse geological and ecological distribution, it has a wider range of morphological traits. Nonethe ...
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Vachellia Cornigera
''Vachellia cornigera'', commonly known as bullhorn acacia (family Fabaceae), is a swollen-thorn tree native to Mexico and Central America. The common name of "bullhorn" refers to the enlarged, hollowed-out, swollen thorns (technically called stipular spines) that occur in pairs at the base of leaves, and resemble the horns of a steer. In Yucatán (one region where the bullhorn acacia thrives) it is called "subín", in Panamá the locals call them "cachito" (little horn). The trees are commonly found in wet lowlands Morphology Bullhorn acacias are often found as 10 meter (33 ft.) trees. Their bark is gray to brown in color and has small furrows. The new growth of the branches is a reddish brown color and is covered in a pubescence, or a covering of small hairs. The leaves are alternate with a pair of stipular spines where the leaf connects to the branch. The spines can vary widely in color from brown, red, and yellow. The spines are home to ants that protect the plant from ...
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