Abstract: This paper deals with the parallel evolution in Litsea and Lin-deria of Lauraceae which is noL only occured in the infrageneric level but also in the generic level. Lit sea and Lindera devcloped into Dodecadenia and Ite- adaphlne and evolved from Parasassafras and Sinosassafras separately. Li- tsea subg. Uniflos Yang et P. H. Huang has been reduced to the genus Do- decadenia and Litsea monantha Yang et P. H. Huang to Dodecadenia gran- diflora Nees var. grandiflora according to the type specimen. Lindera cau-data (Nees) Hook. f. has been recombinated to the genus Iteadaphne as I.caudata (Nees) H. W. Li, comb. nov. In addition, a new genus Sinosassa- fras H. W. Li has bcen cstablished from Parasassafras Long only on the basis of 2-locellate anther.

Key words: parallel evolution

摘要： 本文阐述樟科木姜子属及山胡椒属两者在形态、分布、起源及演化等方面有许多共同之处，不仅在属内具有平行演化的情况，而且各自平行演化成单花木姜子属 Dodecade－nia和单花山胡椒属Iteadaphne。同时两者又分别自4药室的拟擦术属Parasassafras和2药室的黄脉擦术属 sinosassafras演化而来。本文将单花木姜子亚属 Litsea subg．Uniflos Yang et P．H．Huang归人单花木姜子属，并把 Litsea monantha Yang et P．H．Hu－ang一种作为单花木姜子（原变种）Dodecadenia grandiflora Nees var．grandiflora的新异名，恢复了单花山胡椒属Iteadaphne Bl.，并将香面叶Lindera caudata（Nees）Hook·f．重新组合归入该属为Ⅰ．caudata（Nees）H．W．Li，comb．nov。此外，本文还发表了一个新属即黄脉擦木屑 Sinosassafras H．W．Li，gen．nov.，它具有2药室花药而不同于其平行演化的拟擦本属。

关键词: 平行演化