Taxonomic Composition of <i>Iris</i> Subser. <i>Chrysographes</i> (Iridaceae) Inferred from Chloroplast DNA and Morphological Analyses
The species of <i>Iris</i> subser. <i>Chrysographes</i> are herbaceous perennials found mainly in southwestern and central China and also in the Eastern Himalayas. To date, six species have been recognized in this group. In the framework of its taxonomic revision, we have car...
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| Autores principales: | , , |
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| Formato: | article |
| Lenguaje: | EN |
| Publicado: |
MDPI AG
2021
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/07db74555a0c49fb92a27ce18ba31938 |
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| Sumario: | The species of <i>Iris</i> subser. <i>Chrysographes</i> are herbaceous perennials found mainly in southwestern and central China and also in the Eastern Himalayas. To date, six species have been recognized in this group. In the framework of its taxonomic revision, we have carried out molecular and morphological studies. For this, we have sequenced four chloroplast DNA regions (<i>trnS</i>–<i>trnG</i>, <i>trnL–trnF</i>, <i>rps4–trnS</i><sup>GGA</sup>, and <i>psbA</i>–<i>trnH</i>) for 25 samples across the major distribution ranges of the six species. Our phylogenetic analyses evidence that <i>I.</i> subser. <i>Chrysographes</i> is indeed a monophyletic group, which is sister to <i>I.</i> subser. <i>Sibiricae</i>. Within <i>I.</i> subser. <i>Chrysographes</i>, we have recovered four divergent lineages further supported by diagnosable morphological traits and geographical distributions. In this context, our data confirm the recognition of <i>I. clarkei</i>, <i>I. delavayi</i>, and <i>I. wilsonii</i> in their traditional concepts. Furthermore, both molecular and morphological data support the close affinities and similar distribution ranges of <i>I. bulleyana</i>, <i>I. chrysographes</i>, and <i>I. forrestii</i>, which suggests including <i>I. chrysographes</i> and <i>I. forrestii</i> as color forms in <i>I. bulleyana</i>. A revised taxonomic treatment for the group, including the notes on the species distributions and habitats, and also an identification key to the species are provided. |
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