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Klackenbergia (Gentianaceae – Exaceae), a new endemic genus from Madagascar

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Abstract:

Several lines of evidence (morphological, karyological and molecular) support the exclusion of both Sebaea madagascariensis Klack. and S. condensata Klack. from Sebaea Sol. ex. R. Br. (Gentianaceae – Exaceae), resulting in the establishment of a new genus Klackenbergia Kissling and two new species combinations: K. stricta (Schinz) Kissling (= S. madagascariensis) and K. condensata (Klack.) Kissling. Klackenbergia is endemic to Madagascar and is morphologically recognized by its inflorescence with long bracts and bracteoles and subsessile flowers arranged in axillary fascicules at each node. Affinities with the other genera of the tribe Exaceae (Exacum, Gentianothamnus, Ornichia, Sebaea, Tachiadenus) are discussed.

Keywords: BELMONTIA; EXACEAE; GENTIANACEAE; MADAGASCAR; SEBAEA; SYSTEMATICS; TAXONOMY

Document Type: Research Article

Affiliations: 1: Laboratoire de Botanique Evolutive, Université de Neuchâtel, Rue Emile-Argand 11, 2009 Neuchâtel, Switzerland;, Email: Jonathan.Kissling@unine.ch 2: Laboratoire de Botanique Evolutive, Université de Neuchâtel, Rue Emile-Argand 11, 2009 Neuchâtel, Switzerland 3: Institute for Systematic Botany, University of Zürich, Zollikerstrasse 107, 8008 Zürich, Switzerland

Publication date: 2009-08-01

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