A morphological and anatomical survey of Virectaria (African Rubiaceae), with a discussion of its taxonomic position
Identifieur interne : 000B89 ( Istex/Corpus ); précédent : 000B88; suivant : 000B90A morphological and anatomical survey of Virectaria (African Rubiaceae), with a discussion of its taxonomic position
Auteurs : S. Dessein ; S. Jansen ; S. Huysmans ; E. Robbrecht ; E. SmetsSource :
- Botanical Journal of the Linnean Society [ 0024-4074 ] ; 2001-09.
English descriptors
- KwdEn :
Abstract
A detailed morphological and anatomical study of the tropical African genus Virectaria is presented. The observations are used to characterize the genus, to propose a key to all eight species, and to unravel the relationships between the species using cladistics. A taxonomic survey of the genus is also given. Verdcourt's infraspecific taxa based on calyx morphology in V major are adopted, but it was found that morphological distinction is correlated with ecological, habit and distributional differences. Hence, it is better to recognize Verdcourt's varieties spathulata and major as subspecies of V. major. The problematic systematic position of the genus is discussed in detail. New evidence is given for the exclusion of the genus from the Hedyotideae and Ophiorrhizeae (subfamily Rubioideae). The recently proposed position in the Sabiceeae (subfamily Ixoroideae) is not convincing either, since none of the genera included in the Sabiceeae matches Virectaria with respect to pollen, fruit, flower and growth habit. Exclusion from the Rubioideae and a position near the Sabiceeae is supported by lack of raphides, seed anatomy, placentation, stipule morphology and molecular evidence. Molecular data from a larger number of taxa are needed to confirm the position of the genus.
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DOI: 10.1111/j.1095-8339.2001.tb01102.x
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<mods version="3.6"><titleInfo lang="en"><title>A morphological and anatomical survey of Virectaria (African Rubiaceae), with a discussion of its taxonomic position</title>
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<titleInfo type="alternative" contentType="CDATA" lang="en"><title>A morphological and anatomical survey of</title>
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<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">DESSEIN</namePart>
<affiliation>Laboratory of Plant Systematics, Institute of Botany and Microbiology, K.U. Leuven, Kasteelpark Arenberg 31, B‐3001 Leuven, Belgium</affiliation>
<description>Correspondence: *E‐mail: </description>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">JANSEN</namePart>
<affiliation>Laboratory of Plant Systematics, Institute of Botany and Microbiology, K.U. Leuven, Kasteelpark Arenberg 31, B‐3001 Leuven, Belgium</affiliation>
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<name type="personal"><namePart type="given">S.</namePart>
<namePart type="family">HUYSMANS</namePart>
<affiliation>Laboratory of Plant Systematics, Institute of Botany and Microbiology, K.U. Leuven, Kasteelpark Arenberg 31, B‐3001 Leuven, Belgium</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">E.</namePart>
<namePart type="family">ROBBRECHT</namePart>
<affiliation>National Botanic Garden, Domein van Bouchout, B‐1860 Meise, Belgium</affiliation>
<role><roleTerm type="text">author</roleTerm>
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</name>
<name type="personal"><namePart type="given">E.</namePart>
<namePart type="family">SMETS</namePart>
<affiliation>Laboratory of Plant Systematics, Institute of Botany and Microbiology, K.U. Leuven, Kasteelpark Arenberg 31, B‐3001 Leuven, Belgium</affiliation>
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<originInfo><publisher>Blackwell Publishing Ltd</publisher>
<place><placeTerm type="text">Oxford, UK</placeTerm>
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<dateIssued encoding="w3cdtf">2001-09</dateIssued>
<edition>Received April 2000; accepted for publication January 2001</edition>
<copyrightDate encoding="w3cdtf">2001</copyrightDate>
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<language><languageTerm type="code" authority="rfc3066">en</languageTerm>
<languageTerm type="code" authority="iso639-2b">eng</languageTerm>
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<abstract lang="en">A detailed morphological and anatomical study of the tropical African genus Virectaria is presented. The observations are used to characterize the genus, to propose a key to all eight species, and to unravel the relationships between the species using cladistics. A taxonomic survey of the genus is also given. Verdcourt's infraspecific taxa based on calyx morphology in V major are adopted, but it was found that morphological distinction is correlated with ecological, habit and distributional differences. Hence, it is better to recognize Verdcourt's varieties spathulata and major as subspecies of V. major. The problematic systematic position of the genus is discussed in detail. New evidence is given for the exclusion of the genus from the Hedyotideae and Ophiorrhizeae (subfamily Rubioideae). The recently proposed position in the Sabiceeae (subfamily Ixoroideae) is not convincing either, since none of the genera included in the Sabiceeae matches Virectaria with respect to pollen, fruit, flower and growth habit. Exclusion from the Rubioideae and a position near the Sabiceeae is supported by lack of raphides, seed anatomy, placentation, stipule morphology and molecular evidence. Molecular data from a larger number of taxa are needed to confirm the position of the genus.</abstract>
<subject lang="en"><genre>Keywords</genre>
<topic>cladistic analysis</topic>
<topic>fruit</topic>
<topic>ovary</topic>
<topic>pollen morphology</topic>
<topic>Sabiceeae</topic>
<topic>seed anatomy</topic>
<topic>wood anatomy</topic>
</subject>
<relatedItem type="host"><titleInfo><title>Botanical Journal of the Linnean Society</title>
</titleInfo>
<genre type="Journal">journal</genre>
<identifier type="ISSN">0024-4074</identifier>
<identifier type="eISSN">1095-8339</identifier>
<identifier type="DOI">10.1111/(ISSN)1095-8339</identifier>
<identifier type="PublisherID">BOJ</identifier>
<part><date>2001</date>
<detail type="volume"><caption>vol.</caption>
<number>137</number>
</detail>
<detail type="issue"><caption>no.</caption>
<number>1</number>
</detail>
<extent unit="pages"><start>1</start>
<end>29</end>
<total>29</total>
</extent>
</part>
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<identifier type="istex">DADA37DAE5D7569E49E92A714D5421B7428EBF14</identifier>
<identifier type="DOI">10.1111/j.1095-8339.2001.tb01102.x</identifier>
<identifier type="ArticleID">BOJ1</identifier>
<recordInfo><recordContentSource>WILEY</recordContentSource>
<recordOrigin>Blackwell Publishing Ltd</recordOrigin>
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