21. The vegetation is primarily acacia trees with the bushes and shrubs common to the lowland portions of Ethiopia. 22. On recent visits, scientists found acacia trees growing on the site, their roots encroaching on the footprints. 23. The expansive grounds are lush with landscaping, planted with mango and acacia trees , shrubs and flowering plants. 24. And homeowners are happy to see their mesquites, acacia trees and bird-of-paradise bushes grow rapidly. 25. But the small acacia tree named for large two-pronged spines that resemble bulls'horns causes more comment. 26. Acacia trees took root among the several trackways that bear hundreds of animal footprints as well as the hominid prints.27. One popular ingredient is gum arabic, which is made from the sap of certain species of the acacia tree . 28. A goat that gets a snootfull of ants will avoid their acacia tree for up to a month, she said. 29. Perched among the top branches of an acacia tree , Hassan Abdoulaye scanned the horizon for the tallest animal on earth. 30. Thorns such as those found on roses or acacia trees are one example, as are the spines on a cactus.
