Abstract: Growth and contents of chemical elements of 6 r are and endangered species of plants from limestone regions were studied and com pared between different substrates limestone soil and acid red soil.Results show ed that:(1) there was no big difference between the two groups of plants in phen ological characteristics;(2)The growth of Heteroplexis microcephala and Pt eroceltis tatarinowii in limestone soil were higher than in acid soil,but that of Hainania trichosperma was lower;(3) The contents of Ca and B in these 6 species in limestone soil were higher than in acid soil,but the contents of Al i n the plants,except Hainania trichosperma,which was in reverse,were higher i n acid soil;(4)The biological absorption coefficients of K,Zn and B by the plant s in limestone soil were higher than in acid soil,while those of other elements such as N,P,Ca,Mg,Fe,Al and Mn were just on the contrary.