Abstract:
The first attempt to study the flora of the study area was in 1958, which included in the work of Harrison and Jackson about classification of the Sudan vegetation. The study area was very rich of plant diversity, especially trees, because of the high rainfall.This study is an attempt to investigate and update the associations between the treespecies to know their ecological positions among the vegetation cover.A field survey was conductedin the years 2011 to 2012 at the south-eastern part of Sinnar State for two seasons. Five major transects were taken, each of 3000m length, 10m width in a total area of 150.000m2.Results showed that Acacia seyalis thedominant tree species throughout the study area, with Acacia nilotica and Balanitesaegyptica as ecological associates, because they were abundant, frequent and ofhighdensity, and less diversity in the area in the two seasons
