POLYGONACEAE: &lt;i&gt;OXYGONUM ALTISSIMUM&lt;/i&gt;, A NEW SPECIES FROM CENTRAL SOMALIA

Germishuizen, G.

doi:10.4102/abc.v19i2.961

Cited by 3 publications

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“…2). Additional cp and nr data for more species of Oxygonum are clearly needed to determine its phylogenetic position since only one of the approximately 35 species (Graham, 1957(Graham, , 1958Germishuizen, 1987Germishuizen, , 1989Ortiz & Paiva, 1999;Ortiz, 2003) is included in this study.…”

Section: Discussionmentioning

confidence: 99%

Phylogeny of Polygoneae (Polygonaceae: Polygonoideae)

Schuster

Reveal

Kron

2011

TAXON

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Genera included in Polygoneae such as Atraphaxis, Duma, Fallopia, Muehlenbeckia, Polygonella, Polygonum, Oxygonum, and Reynoutria are investigated using a molecular framework. Previous morphological studies had indicated that Polygonum is composed of sections Duravia, Polygonum, and Pseudomollia with the genus Polygonella included as a subsection of Polygonum sect. Duravia. One nuclear (nrITS) and three chloroplast (matK, ndhF, trnL–trnF) regions were analyzed with Maximum Parsimony and Maximum Likelihood methods to address evolutionary relationships within the tribe. The results show that Polygoneae is composed of three main clades: Knorringia as sister to all other taxa within Polygoneae, a clade of Reynoutria and Fallopia+Muehlenbeckia, and their sister clade of Atraphaxis, Duma, and Polygonum. The currently accepted sections within Polygonum are recovered and Polygonum sect. Duravia is sister to sections Polygonum and Pseudomollia. With Polygonella included in Polygonum, the appropriate new combinations and names are proposed. In addition, a few species of Polygonum are transferred to Atraphaxis. Oxygonum is not supported as a member of Polygoneae and its exact position awaits additional data.

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Section: Discussionmentioning

confidence: 99%

Phylogeny of Polygoneae (Polygonaceae: Polygonoideae)

Schuster

Reveal

Kron

2011

TAXON

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“…This genus is composed of ca. 35 species (Graham, 1957(Graham, , 1958Germishuizen, 1987Germishuizen, , 1989Ortiz & Paiva, 1999;Ortiz, 2003) and is restricted to the African continent and Madagascar. Oxygonum is an annual or perennial herb or shrub with paniculate inflorescences.…”

Section: Incertae Sedismentioning

confidence: 99%

Taxonomy of Polygonoideae (Polygonaceae): A new tribal classification

Sánchez

Schuster

Burke

et al. 2011

TAXON

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The subfamily Polygonoideae has a world‐wide distribution and is an important component of many countries’ floras. In this study we present the most comprehensive sampling available to date, including data from three chloroplast genes (matK, ndhF, rbcL) for 82 species in Polygonaceae (54 from Polygonoideae). Based on our results, we propose a new taxonomic classification for Polygonoideae that includes five well‐supported tribes: Calligoneae, Fagopyreae, Persicarieae, Polygoneae, and Rumiceae. Overall, the results from molecular data represent significant progress in understanding the evolutionary relationships of major groups within the family. This classification also provides an assessment of diagnostic morphological characters for the tribes. The present work will promote reevaluation of morphological characters within this diverse group, especially synapomorphies for Polygonoideae, and for tribes with a particularly complex history such as Fagopyreae, Persicarieae, and Polygoneae. A new combination, Fagopyrum tibeticum, is proposed.

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“…When Graham (1957) published his monograph of the genus, Oxygonum comprised 29 species distributed throughout Africa (except the north‐west area) and Madagascar (where only two species are known). Since that time only three new species have been described: Oxygonum robustum (South Africa, Natal) and O. altissimum (Somalia) described by Germishuizen (1987 and 1989, respectively), and O. annuum (Zambia), by Ortiz & Paiva (1999).…”

Section: Introductionmentioning

confidence: 99%

Two new species of the Oxygonum stuhlmannii–atriplicifolium complex (Polygonaceae) from Somalia

Ortiz

2003

Botanical Journal of the Linnean Society

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In the course of taxonomic research of the Polygonaceae for the Flora Zambesiaca and Conspectus Florae Angolensis projects, all the species of the genus Oxygonum Burch. ex Campd. in tropical Africa were studied. This resulted in the description of two new species: Oxygonum thulinianum and O. hastatum from Somalia. These species belong to the Oxygonum stuhlmannii–atriplicifolium complex, a group of species characterized by fruits with three prickles or teeth, and leaves always or sometimes sagittate to hastate. © 2003 The Linnean Society of London, Botanical Journal of the Linnean Society, 2003, 142, 341–345.

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POLYGONACEAE: <i>OXYGONUM ALTISSIMUM</i>, A NEW SPECIES FROM CENTRAL SOMALIA

Abstract: OXYGONUM ALTISSIMUM, A NEW SPECIES FROM CENTRAL SOMALIA

Cited by 3 publications

References 0 publications

Phylogeny of Polygoneae (Polygonaceae: Polygonoideae)

Phylogeny of Polygoneae (Polygonaceae: Polygonoideae)

Taxonomy of Polygonoideae (Polygonaceae): A new tribal classification

Two new species of the Oxygonum stuhlmannii–atriplicifolium complex (Polygonaceae) from Somalia

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