Litchi (Litchi chinensis Sonn. ) is a unique kind of fruit having aril as its edible flesh. It can be regarded as a complex system of correlation among its various tissues. Biostatistic methods such as simple correlation, path coefficient, partial correlation etc. were used in exploring the complexity of the system. The main results were as follows:The stimulative effects exerted by seedcoat on aril consisted of both direct effect by the seedcoat per se and indirect effect through perjcap (peel) .Embryo exe...