Abstract: The geographical variation in the chlorophyll fluorescence induction kinetics of Pinus armandi was studied by measuring the chlorophyll fluorescence of intact needles of five seed sources distributing from northern to southern China. Results show that P. armandi growing in southern China possessed the higher values of the maximum fluorescence (Fm),variable fluorescence (Fv)and FvFm. This is an indication of that potential activity of PS Ⅱ and the efficiency of light conversion were higher in southern populations than in northern populations, and positively correlated with the growth of tree height. On the contrary, the coefficients of non-photochemical fluorescence quenching (On) was negatively interrelated with the variation of growth. It was higher in southern population than in northern populations. These results demonstrate that the analysis of fluorescence induction kinetics is applicable to prediction of the potential growth of tree height, and to the selection of optimum seed sources of Pinus armandi.