北美洲是中国外来树种的主要来源之一，北美树种人工林约占中国现有外来树种人工林总面积的75%.北美东部的树种在我国引种易于成功，原因是两地的自然条件相似；而北美西部的树种，虽然两地在地史上曾有过紧密联系，但现代植物的生境，尤其是降雨类型的巨大差异，使引种不易成功。我们认为，引种北美木本植物还有巨大潜力。

North America (incl. Central America) is one of the improtant donors of Chinese exotic tress. About 500 woody species in 202 genera have been grown in China for many year. Improtant tree species are Pinus spp, Taxodium spp, Robinia pseudoacacia, Amorpha fruticosa, and Populus spp, which make up 75% of the exotic tree plantation area in China. Prosperous woody species are those of Cupressaceae, Quercus, Acer, Carya, Prunus, Swietenia, Fraxinus, Magnoliaceae, and Cactaceae etc., which originate mainly form E. North America and tropical America, while those species originated in W. North America, such as Picea sitchensis, Pinus radiata, Pseudotsuga menziesii, Simmondsia jojoba, are unsuitable for plantation in China except in SW. China. Provenance trials have been conducted since 1970s for a few major tree species, species/provenance trials are still needed for most exotic woody species.