New insights into the origin of two new epiphytic Impatiens species (Balsaminaceae) from West Central Africa based on molecular phylogenetic analyses
During recent fieldwork activities conducted in order to complete the publication of the Flora of Gabon, new material was collected of two previously unknown Impatiens species. Molecular phylogenetic analyses and a detailed comparative morphological study confirmed the status of the newly collected material. Impatiens wilksiana Stévart, S. B. Janssens & Eb. Fisch. is characterized by a dense racemose inflorescence, rather small flowers, yellow petals and red sepals, whereas I. issembei S. B. Janssens, Stévart & Eb. Fisch. has few-flowered racemose inflorescences and larger flowers, which are entirely vivid-red. The divergence of I. issembei and I. wilksiana is estimated at 0.96 Ma ago, an age that corresponds with a shift towards increasingly variable drier conditions situated between 1.2 and 0.8 Ma ago. During this period, the once continuous ancestral population of I. issembei and I. wilksiana was probably fragmented into two sister populations restricted to the forest refuges in the Massif du Chaillu and the Monts de Cristal. Allopatric speciation in association with such refuges may have played a role in the origin and diversification of the present day African Impatiens.
No Reference information available - sign in for access.
No Citation information available - sign in for access.
No Supplementary Data.
No Article Media
Document Type: Research Article
Publication date: 2010-10-01
More about this publication?
Impact Factor (2016): 2.45
Taxon electronic back issues (1950-2001) have been released in 2005
Submission of manuscripts: www.editorialmanager.com/taxon
- Information for Authors
- Subscribe to this Title
- Membership Information
- Information for Advertisers
- Regnum Vegetabile
- Taxonomic Literature online
- Taxon electronic back issues (1950-2001) hosted by JSTOR
- Ingenta Connect is not responsible for the content or availability of external websites