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水烛的花部形态观察——兼论与长苞香蒲的分类学界定

郭鑫, 王东

郭鑫, 王东. 水烛的花部形态观察——兼论与长苞香蒲的分类学界定[J]. 植物科学学报, 2013, 31(4): 321-327. DOI: 10.3724/SP.J.1142.2013.40321
引用本文: 郭鑫, 王东. 水烛的花部形态观察——兼论与长苞香蒲的分类学界定[J]. 植物科学学报, 2013, 31(4): 321-327. DOI: 10.3724/SP.J.1142.2013.40321
GUO Xin, WANG Dong. Observation on Floral Morphology of Typha angustifolia, with Implications for Delimitating the Species and T. domingensis[J]. Plant Science Journal, 2013, 31(4): 321-327. DOI: 10.3724/SP.J.1142.2013.40321
Citation: GUO Xin, WANG Dong. Observation on Floral Morphology of Typha angustifolia, with Implications for Delimitating the Species and T. domingensis[J]. Plant Science Journal, 2013, 31(4): 321-327. DOI: 10.3724/SP.J.1142.2013.40321

水烛的花部形态观察——兼论与长苞香蒲的分类学界定

基金项目: 国家自然科学基金面上项目(30870151);中国科学院植物研究所系统与进化植物学国家重点实验室开放课题(LSEB2011-06);国家自然科学基金委重大国际合作项目(31110103911);华中师范大学中央高校基本科研业务费(CCNU10C01004)项目资助。
详细信息
    作者简介:

    郭鑫(1985-),女,硕士研究生,从事植物分类学研究。

    通讯作者:

    王东,E-mail:dongwang.cn@gmail.com

  • 中图分类号: Q949.71+1.1

Observation on Floral Morphology of Typha angustifolia, with Implications for Delimitating the Species and T. domingensis

  • 摘要: 通过腊叶标本研究、野外观察和文献考证,结合栽培试验,研究了香蒲科水烛(Typha angustifolia L.)花部结构特征,补充描述了该种丝状毛在子房柄上的着生方式、小穗不孕雌花数目等性状特征,观察了在成熟期不同阶段其孕性雌花柱头与小苞片的长度变异。结果显示,水烛孕性雌花小苞片呈宽披针形、匙形或条形,先端褐色,短于柱头,或与柱头近等长或稍长于柱头;子房柄上的丝状毛除少数散生外,多数基部合生呈鞘状或束状,在子房柄下部呈1~4轮排列;小穗不孕雌花常3(~4)枚。研究材料在7月中旬前后雌花小苞片明显短于柱头,随果穗成熟小苞片与柱头近等长。长苞香蒲(T.domingensis Pers.)子房柄上的丝状毛形态和着生方式与水烛中的情况基本一致,但小苞片白色透明,小穗不孕雌花常1(~2)枚。这表明水烛孕性雌花小苞片和柱头的长度比例与不同成熟阶段有关系,不宜作为与长苞香蒲的区别特征,而小穗不孕雌花数目和小苞片颜色等特征对两物种的划分有较重要的意义。
    Abstract: The floral morphology and structure of Typha angustifolia L.(Typhaceae) were studied by examining a large number of specimens and observing population variation both in field and cultivated plants.A new description with respect to morphology of the apex of bracteole, hair of pistillate flowers, and the number of abortive pistillate flowers of a spikelet were provided and illustrated.Additionally, the variability of lengths of stigma, bracteole and hair of the fertile pistillate flower during the mature period were addressed based on observation of cultivated plants.T.angustifolia was very similar to T.domingensis in overall gross mor-phology.Several characters, however, can be used to separate them.In T.angustifolia the apex of bracteoles was dark brown and opaque and spikelets consisted of 3 or 4 abortive pistillate flowers.In T.domingensis the apex of bracteoles was pale and translucent and spikelets consisted of 1 or 2 abortive pistillate flowers.Observations on T.angustifolia both in the field and on cultivated plants further revealed that it had a great degree of variability in relative length of bracteole and stigma, suggesting that these characters should not be used for specific diagnosis.The results showed that T.angustifolia and T.domingensis differed in color of the apex of bracteole and the number of abortive flowers of a spikelet, providing a basis for the delimitation between the two species.
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出版历程
  • 收稿日期:  2012-12-19
  • 修回日期:  2013-01-06
  • 发布日期:  2013-08-29

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