Through many investigations of mixed forest communities of Lithocarpus glaber in Central Hunan's hilly country, the species diversity of the communities has been studied by adopting Simpson and Shannon Diversity index, corresponding homogeneous degree and meeting probilbility among species. The results indicate that the arbor layer Simpson diversity index is 0.624, the shrub layer's is 0.814; the arbor layer Shannon diversity index1.814,the shrub layer's is 3.197;the meeting probability among species is 0.625( arbor layer) and 0.814( shrub layer) , the evenness is 45.80% ( arbor layer) and 63....
