Generative ontogeny in Tiquilia (Ehretiaceae: Boraginales) and phylogenetic implications |
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Authors: | Marc Gottschling Sebastian Nagelmüller Hartmut H Hilger |
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Institution: | 1. Department Biologie, Systematische Botanik und Mykologie, GeoBio‐Center, Ludwig‐Maximilians‐Universit?t München, , D‐80638 München, Germany;2. Systematische Botanik und Pflanzengeographie, Institut für Biologie, Freie Universit?t Berlin, , D‐14195 Berlin, Germany |
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Abstract: | Tiquilia is very different from the other members of the Ehretiaceae (Boraginales) in many aspects of morphology and ecology. Because detailed knowledge about flower and fruit traits is necessary to reliably infer character evolution of and within Tiquilia, we investigated flower to fruit ontogeny in eight species of Tiquilia using light and electron microscopy. Tiquilia accumulated a number of autapomorphies such as the prostrate growth form, the lack of lateral and ventral bundles in the gynoecium, and the formation of nutlet‐like mericarpids as dispersal units instead of more or less succulent drupes. The internal architecture of the superior bicarpellate ovary resulted from the development of several secondary septa including apical, basal and false septa, as it has been reported also from other Boraginales. However, no character found in Tiquilia can be regarded as synapomorphic with any other taxon of the Ehretiaceae. © 2014 The Linnean Society of London, Biological Journal of the Linnean Society, 2014, 112 , 520–534. |
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Keywords: | anatomy Boraginaceae gynoecium morphology nutlet secondary septa SEM |
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