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Plant Diversity ›› 1997, Vol. 19 ›› Issue (04): 1-3.

• 研究论文 •    

五福花科花部形态的变异式样及其系统学意义

梁汉兴   

  1. 中国科学院昆明植物研究所,昆明650204
  • 出版日期:1997-08-25 发布日期:1997-08-25

VARIATION PARTERNS OF FLORAL MORPHOLOGY AND ITS SYSTEMATIC SIGNIFICENCE

Liang Hanxing   

  1. Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204
  • Online:1997-08-25 Published:1997-08-25

摘要: 由于四福花Tetradoxa顶花、侧花均为典型的4数花,并被认为是科内最原始的属,因而长期以来关于五福花Adoxa“总苞一萼”还是“萼一花冠”的争议得到了彻底解决。根据本研究,五福花顶花和侧花的变异率较五福花科另外3个分类群要高得多。五福花顶花和侧花的变异率分别为 20%和 36.l%。通过后位雄蕊的退化和两侧相邻花瓣的融合,雄蕊和花瓣从 6数到3数的减少系列仅存在于五福花中。本文假设五福花科顶花和侧花的祖先型均起源于2数花。该科现存3属4种可能是从原始2数花通过复化(包括裂生)、减化(包括融合)的过程而发生的。

关键词: 五福花科, 花部形态, 变异式样

Abstract: Accoding to its typical 4-merous flower, both terminal and lateral flower,Tetradoxa has been considered as the primitive genus in Adoxaceae. As a result, the long term contraversy about "invo1ucre-calyx" or "calyx-carolla" in Adoxa was settled here. According to this study, the rates of variation flowers in Adoxa moschatellina are much higher than the other 2 genera including 3 species in Adoxaceae. The rates of variant flowers in Adoxa moschatellina are 20% in terminal flowers and 36.1 % in lateral flowers. A reductive series by the reduction of poste-rior stamen and fusion of the adjacent carollamlobes from 6-merous to 3 merous of carolla and stamen exists in Adoxa only. The ancester form of Adoxaceae with both terminal and lateral flower is suggeted to be 2-merous. At Present, 3 genera including 4 species in the family seem to have been derived from the original 2-merous flower by multiplication (including diversity), reduction (in-cluding fusion) of the flower parts.

Key words: Adoxaceae