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Systematic relationships in southern African Oxalis L. (Oxalidaceae): congruence between palynological and plastid trnL-F evidence

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In the most recent morphology-based taxonomic classification of African Oxalis L., 206 species were recognized in nine indigenous southern African sections. A subsequent palynological review of these taxa conflicted with their taxonomic classification. In the present study, phylogenetic relationships within section Angustatae subsection Lineares are re-assessed, using plastid trnL-F non-coding DNA sequence data. The results of this study clearly indicate that, based on the DNA evidence, subsection Lineares is non-monophyletic. Previously hypothesized relationships within the subsection are also refuted. In contrast, molecular and palynological data are highly congruent, and both differ substantially from the current morphological classification for subsection Lineares.
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Keywords: LINEARES; OXALIS; PALYNOLOGY; PARAPHYLETIC; TRNL-F

Document Type: Research Article

Affiliations: 1: Botany Department, University of Stellenbosch, Private Bag X1, Matieland, 7601, South Africa. 2: Biochemistry Department, University of Stellenbosch, Private Bag X1, Matieland, 7601, South Africa.

Publication date: 2004-11-01

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