Abstract: The genus Maytenus was established in 1782 by Molina and Gymnosporia in 1834 by Wight & Arn. There are 325 species of both have been recorded in the whole world (Airy-Shaw, 1973) and 8 species from China (One is Maytenus, seven are Gymnosporia) .In recent years, some of new species were discovered in China. Up to now, 23 native species and there is also a variety have been verified.

Key words: taxonomical, problem, genus, maytenus, molina, China

摘要： 美登本属由Molina于1782年建立，裸实属由Wight和Arn于1834年建立，两属在全世界共记载约325种（Airy－Shaw1973年），国产计8种（美登木1种，裸实了种），近年来不少新种已在国内被发现，至今已确定的计23种、1变种。 我们研究了美登本属和裸实属的分属特征，并对国产各种作了研究，发现美登木和裸实属是不可分的，即是说，作为确定属的界限是不稳定的，两者都具有相似的特征，如，美登木和裸实属的花序都为聚个花序，簇生或单生，两者的花便有或无关节；子房均为2-3室，每室具种子1—2枚；两者或有或无短枝及刺，等．因此，我们认为美登本属与裸实属应予以合并，国产裸实应一并转人美登木属中。

关键词: 美登本属, 裸实属, 分类