Abstract: Quercus variabilis and Quercus acutissima which distribute widely in China has got a high starch content.The plants have been valued as a non-grain ethanol crop inland.For better exploitation and utilization of Quercus resources,this study made clear the definite distribution regions in China on the basis of a systematic and comprehensive investigation of its resource distribution,and made regionalization according to the forest stand concentrated degree and types.The results are as follows:(1)Q.variabilis and Q.acutissima are distributed in 23 provinces of China.Q.variabilis scatters in cool temperate zone,warm temperate zone,northern subtropics and torrid zone,Q.acutissima scatters in warm temperate zone,northern subtropics and torrid zone.(2)The horizontal distribution of Q.variabilis and Q.acutissima on the whole a straight line on the northeast,southwest direction,along the eastern and southern coastline shaped like “D”.(3)The corelation between the altitude threshold of Q.variabilis and Q.acutissima with dimension was poor(R²=0.162,5、0.019 1 and 0.259,4、0.060 6),but was corelated very high with longtitude(R²=0.708,5、0.494 1 and 0.763 5、0.705 0)(both the up limit and the down limit decreased while the longtitude increased).(4)The concentrated area of Q.variabilis and Q.acutissima are Qinba mountaina and east Longnan mountain,Funiu mountain,Tongbo mountain and North Dabie Mountain,which is the best region of development and exploitation of Q.variabilis and Q.acutissima.

Key words: Quercus variabilis, Quercus acutissima, resource investigation, distribution pattern, regionalization