Abstract: The testa sculptures of 11 species and 1 variety belong to Acer Linn.in the Northeast of China were examined by the help of scanning electron microscope (SEM) and the pictures of SEM were taken.The testa sculptures of Acer are divided into four types, as follows:(1) moasaic; (2) hole; (3) striate; (4) reticulate.The close interrelation between similar species is analysed in order to prove reliable evidence for taxonomy of Acer Linn.The morphology of sculptures also support the view of that Acer mono and Acer truncatum were regarded as independent species respectively and it does the view of that Acer pseudo-sieboldianum var.koreanum was regarded as variety of Acer pseudo-sieboldianum.

Key words: Acer, Seed sculpture, Taxonomic significance