Excerpts from Jim Conrad's Naturalist Newsletter. It was a twig section from the tree above me, the tree shown above. Earlier our acacias were place in the genus Acacia but now the trend seems to be to place them in Vachellia A close-up of some thorns shows what's bull-hornish about them below:. Ants chew these holes, enter the hollow thorns and live inside. A single ant colony may span several V. If a herbivore comes along and touches the tree, the ants rush onto the animal and bite.

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Vachellia collinsii is a species of flowering plant. It grows in secondary succession in seasonally dry ecosystems in southern Central America , where it exhibits a symbiotic relationship with several species of ant Pseudomyrmex spinicola , Pseudomyrmex ferruginea. The ants chew holes in the tips of the hollow stipular thorns , known as domatia , so that they can enter, and create their colony inside.

A single ant colony may span several V. The ants protect the trees from attack by other insects. Some ant species even cut down vegetation on the ground surrounding their trees and trim the encroaching branches of other plants, which allows the V.

In exchange, V. Vachellia collinsii also provides the ants with sugar-rich nectar from extrafloral nectaries located at the leaf petiole. From Wikipedia, the free encyclopedia. This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Hidden categories: Articles needing additional references from February All articles needing additional references Articles with 'species' microformats Commons category link is on Wikidata All stub articles.

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Acacia collinsii

Acacia collinsii Saff. Acacia collinsii Fabaceae Species Page, April 1, Dehiscent sheath containing seeds enwrapped in yellow aril which becomes exposed upon the opening of the sheath. Longitudinal cut of the fruit Seeds Leaves:. Dark green on the upper surface and light green on the under surface.


Acacia collinsii Saff.


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