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植物研究 ›› 1989, Vol. 9 ›› Issue (1): 125-138.

• 论文 • 上一篇    

梾木属康定梾木复合群的性状分析及分类处理_向秋云

向秋云   

  1. 北京, 中国科学院植物研究所
  • 出版日期:1989-03-15 发布日期:2016-06-13

TAXONOMY OF CORNUS SCHINDLERI COMPLEX BASED ON QUANTITATIVE ANALYSIS OF SOME CHARACTERS

Xiang Qiu-yun   

  1. Institute of Botany, Academia Sinica, Beijing
  • Online:1989-03-15 Published:2016-06-13

摘要: 本文是应用形态一地理学方法、综合数量统计分析方法对未做过居群研究的复合群进行合理划分的一个成功尝试。康定梾木群(山茱萸科、梾本属)共包含9个名称,分布从横断山区到湖北西部。该合复群内形态变异复杂,特别是交叉变异很多,虽有九个名称,却没有一个性状能将它们间断分开,使标本鉴定极为困难。为弄清其性状的变异规律以进行合理划分,作者将分布区划为四个小区随机取样,选择6个常用作分类特征的数量性状做统计分析,并对有关分类特征作形象化散点图分析,与地理分布综合考虑,得出该合群为两个亚种组成的一个种之结论。

Abstract: The Cornus schindleri Wangerin complex in Cornus subgen. Kraniopsis Raf.consists of several taxa namely C. schindleri Wanger. (1907), C. mombeigii Hemsl. (1909), C.poliophylla Schneid. et Wanger. (1909), C.mombeigii Hemsl.subsp. crassa & subsp. populifolia Fang et W. K. Hu (1980), C. poliophylla Schneid. et Wanger. var. praelonga Fang et W. K. Hu (1981), C. ixienensis Fang et W. K. Hu (1981), C. malifolia Fang et W. K. Hu (1981), C.daijinensis Fang et W. K. Hu (1981), It is widespread from Hengduan Mo-untain region to western Hubei, and easily distinguished from the other members of the subgenus by leaves with crisped hairs and not harsrsh to touch beneath, cymes arranged in corymbs and cylindric style. But within the species complex, the variation is so wide that even two most distinct species can not be recognized. In this paper, quantitative ana lysis is maed for six characters which are usually used for classification, i. e., the length of petiole, the length of style, the length of petal, the length of peduncle, the ratio of the length of filament to that of petal, the ratio of the length of leaf to width, combined with geographical-morphological method in order to understand the variation of the complex and arrive at a reasonable classification. About 100 herbarium specimens are sampled from the distribution region of the complex divided into four sampling areas (tab. 3), each including the localities of the type specimens of one or two names. The statistically analysed data are listed in Tab. 4, 5, 6 and pictorialized scatter diagram of herbarium speciemens is presented in Fig. 2.