Abstract: This paper summarizes the experiment of growing seedlings which 44 seed sources of(P.occidentalis L.) from 4 states like Mississippi are situated in the middle south of America.The test shows that the growth during the seedling stage is rapid under the geographic and climate conditions of Huangshan area.The height of seedling can reach 92.5 cm in the same year,and the ground diameter can reach 0.75 cm,which presents rapid feature.The tender leaves have obviously distinctive reactions to a low temperature and the first frost,while trunks and lateral buds have not been affected by the cold weather,which demonstrates that different varieties of provenances have strong resistance to the cold and can be adapted to growing in the tropical areas in our country.The difference in the seedling height among the provenances as well as in the growth of the ground diameter has reached a certain level.The excellent provenances of the P.occidentalis L.which have the characteristics of high seedling and quick growth of the ground diameter,are distributed over the area of the lower latitude and the higher longitude in the middle south of America.Among these sources, the Alabama’s L21021#, the Louisiana’s F10821#,the Mississippi’s B11029# and T20220# are superior to the average value,which can be the first to be selected as excellent provenances in the tropical areas in China.