Revision and Morphological Phylogeny of Ephedranthus, a Neotropical Genus of Annonaceae

IF 1.1 3区生物学 Q3 PLANT SCIENCES Annals of the Missouri Botanical Garden Pub Date : 2019-06-21 DOI:10.3417/2019305

J. C. Lopes, R. Mello-Silva

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Abstract

Ephedranthus S. Moore is a Neotropical genus of Annonaceae distributed from Colombia and the Guianas to Bolivia and southeastern Brazil, comprised of seven species: E. amazonicus R. E. Fr., E. boliviensis Chatrou & Pirie, E. colombianus Maas & Setten, E. dimerus J. C. Lopes, Chatrou & Mello-Silva, E. guianensis R. E. Fr., E. parviflorus S. Moore, and E. pisocarpus R. E. Fr. The genus is recognized by the combination of leaves with impressed adaxial veins, short pedicels, two to five bracts, androdioecy (i.e., some plants with only staminate flowers, other plants with only bisexual flowers), and 1-seeded monocarps. This revision updates the knowledge about the genus, providing a morphological phylogenetic analysis of Ephedranthus species, with a key, descriptions, distribution maps, and illustrations of the diagnostic characters of the species. The phylogenetic analysis shows Ephedranthus defined by having staminate flowers and basal placentation, and the seven species related as ((E. colombianus, E. boliviensis) ((E. guianensis, E. amazonicus) (E. dimerus (E. parviflorus, E. pisocarpus)))); based on this, the current subdivision of Ephedranthus is not monophyletic, and the sections are here synonymized.

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番荔枝科新热带属麻黄属的修订及形态系统发育

麻黄属(Ephedranthus S. Moore)是番荔枝科的一个新热带属，分布于哥伦比亚和圭亚那到玻利维亚和巴西东南部，由7种组成:E. amazonicus R. E. Fr.、E. boliviensis Chatrou & Pirie、E. colombianus Maas & Setten、E. dimerus J. C. Lopes、Chatrou & Mello-Silva、E. guianensis R. E. Fr.、E. parviflorus S. Moore和E. pisocarpus R. E. Fr.该属的特征是:叶片正面叶脉突出、花梗短、2 - 5片苞片、雄蕊雌花(即一些植物只有雄蕊花，另一些植物只有两性花)和1粒单心植物的组合。本修订版更新了有关麻黄属的知识，提供了麻黄属物种的形态系统发育分析，并提供了该物种的诊断特征的关键、描述、分布图和插图。系统发育分析表明，麻黄属植物以雄蕊花和基部着床为特征，亲缘关系为(E. colombianus, E. boliviensis) (E. guianensis, E. amazonicus) (E. dimerus (E. parviflorus, E. pisocarpus))));在此基础上，目前的麻黄属细分不是单系的，这里的各节是同义的。

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Annals of the Missouri Botanical Garden 生物-植物科学

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3.60

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0.00%

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期刊介绍： The Annals of the Missouri Botanical Garden is a quarterly international journal primarily devoted to systematic botany and evolutionary biology. We encourage submissions of original papers dealing with significant advances in the taxonomy, phylogeny, biogeography, paleobiology, and evolution of plants, and in conservation genetics and biology, restoration ecology, and ethnobiology, using morphological and/or molecular characters, field observations, and/or database information. We also welcome reviews and papers on conceptual issues and new methodologies in systematics. Important floristic works will also be considered. Symposium proceedings discussing a broader range of topical biological subjects are also published, typically once a year. All manuscripts are peer-reviewed by qualified and independent reviewers.

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