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The phylogenetic utility of chloroplast and nuclear DNA markers and the phylogeny of the Rubiaceae tribe Spermacoceae.
TLDR
IT was, despite often raised cautions of its utility at higher taxonomic levels, shown to provide the highest number of parsimony informative characters, and in partitioned Bayesian analyses it yielded the fewest trees in the 95% credible set. Expand
Phylogeny of the Herbaceous Tribe Spermacoceae (Rubiaceae) Based on Plastid DNA Data1
TLDR
This study is the first to address phylogenetic relationships within Spermacoceae from a tribal perspective and provides a phylogenetic hypothesis with broad sampling across the major lineages of Spermcoceae that can be used to guide future species-level and generic studies. Expand
Evolutionary history of the Afro-Madagascan Ixora species (Rubiaceae): species diversification and distribution of key morphological traits inferred from dated molecular phylogenetic trees.
TLDR
Novel ecological opportunities resulting from climate-induced habitat fragmentation and corolla tube length diversification are likely to have facilitated species radiation on Madagascar, suggesting that the same ecological and selective pressures are acting upon taxa from both Madagascan lineages. Expand
A new species of Colletoecema (Rubiaceae) from southern Cameroon with a discussion of relationships among basal Rubioideae
TLDR
A comparative morphological study illustrates the similar placentation and fruit anatomy of the novelty and Colletoecema dewevrei and a paleotropical or tropical African origin of the Rubioideae is hypothesized. Expand
Dispersing towards Madagascar: Biogeography and evolution of the Madagascan endemics of the Spermacoceae tribe (Rubiaceae).
TLDR
Interestingly, not only colonization from Africa occurred but also long distance dispersal from the Neotropics shaped the current diversity of the Spermacoceae tribe on Madagascar. Expand
Description of 11 new Astiella (Spermacoceae, Rubiaceae) species endemic to Madagascar
Astiella is an herbaceous genus endemic to Madagascar, originally described with a single species A. delicatula Jovet. Molecular and morphological evidence place it in the tribe Spermacoceae s. lat.Expand
Amphistemon and Thamnoldenlandia, two new genera of Rubiaceae (Spermacoceae) endemic to Madagascar
TLDR
A molecular phylogenetic study indicates that the Madagascan endemic members of Spermacoceae are the result of at least two independent colonization events, most likely by long-distance dispersal from the African mainland. Expand
Rediscovery of Malagasy Lathraeocarpa allows determination of its taxonomic position within Rubiaceae
TLDR
A phylogenetic reconstruction based on four plastid markers proves that Lathraeocarpa acicularis has its closest relatives among taxa of the Hedyotis-Oldenlandia group of the herbaceous tribe Spermacoceae sensu lato and a detailed survey of the morphology and anatomy of the genus based on recently collected material is presented, providing additional arguments for the new taxonomic position. Expand
Woodiness within the Spermacoceae-Knoxieae alliance (Rubiaceae): retention of the basal woody condition in Rubiaceae or recent innovation?
TLDR
Observations of wood anatomy in Spermacoceae support the molecular hypothesis that all the woody species examined are secondary derived, and in Knoxieae, there is a general trend from primary woodiness towards herbaceousness and back to (secondary) woodiness. Expand
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