Abstract:The anthors had arrcuged a provenances of raising testland 20 provenances of sulseqnent afforest test on 2 speeies of lin0dendron helong to Magnoliaceae family i. e. L. chinensis (Hemsl) sarg and L. talipifera L. collected from china and U. S. A. After six years,the growth factors were measured and Compared With Afterward thr0ugh analysis of variance,The resucts Show that there are very siginificant geutic differences a-mong provenances.