巴山松和油松地理分界和分类关系的数值分析

A NUMERICAL ANALYSIS ON THE DIVIDING LINE OF GEOGRAPHIC DISTRIBUTION AND TAXONOMY RELATION BETWEEN PINUS HENRYI MAST. AND PINUS TABULAEFORMIS CARR.

巴山松和油松二者的地理分界和分类关系一直存在争议。本文基于对包括巴山松分布区和油松分布区南缘部分的15个天然林分球果、种子和针叶方面的24个形态特征的测定,采用多变量分析技术,从群体的角度研究了巴山松和油松的形态差异和地理分界。结果表明,巴山松和油松在球果、种子等形态特征上存在明显差异。作者认为巴山松作为一个独立种为宜,它与油松的地理分界在米仓山至大巴山一线。

The dividing line of geographic distribution and morphological differences between Pinus henryi Mast. and Pinus tabulaeformis Carr. were studied by means of numerical analysis. Data were taken from 24 morphological trails of cones, seeds and needles in natural stands, which included the entire range of Pinus henryi Mast. and the southern part of the range of Pinus tabulaeformis Carr. The results show that the morphological differences between Pinus henryi Mast. and Pinus tabulaeformis Carr. are highly significant. It was confirmed that Pinus henryi Mast. and Pinus tabulaeformis Carr. are indeed two separate species, and the dividing line of geographic distribution between them is located in the Mi-Cang Mountain to the Da-Ba Mountain.