Acacia Fumosa has until recently been under the scientific radar. Not named until 2008, no specimens or botanical mentions had been made about this tree prior, even though it is widespread in its' native land of Ogaden, Somalia.
The oddity isn't the finding of a new species, more that a tree can remain unknown and unnamed and be so widespread. Scientists find and name new species of plants thousands of times a year, a new one being from Africa on average every week.
The Acacia Fumosa has what is described as unusually smooth, gray bark and has flowers that bloom during the dry season with no leaves on the tree. Its' relatives bloom different colored flowers and bloom in the wet seasons.