<p><strong>Revisiting the phylogeny and taxonomy of <em>Osmanthus</em> (Oleaceae) including description of the new genus <em>Chengiodendron</em></strong></p>

Abstract

Osmanthus (Oleaceae) is considered one of the most confusing genera with regards to circumscription and phylogenetic placement of taxa within the subtribe Oleinae of Oleaceae, with controversies mainly focused on the attribution of section Leiolea. In the present study, we analyzed 71 samples that represent the broad taxonomic, biogeographic, and morphological patterns in the subtribe Oleinae. Based on concatenation of four plastid genes (trnL-F, trnT-L, trnS-G, and matK) and comparison with the ITS region, Bayesian Inference, Maximum Likelihood and Maximum Parsimony phylogenies were inferred. Morphological character traits and geographical distributions of taxa were also studied. These results provide strong support for the segregation of the Leiolea clade (Osmanthus marginatus, O. matsumuranus and O. minor) of sect. Leiolea from Osmanthus. Therefore, the Leiolea clade is instated as the new genus Chengiodendron, with a taxonomic treatment provided. This study provides a clearer understanding of the phylogenetic relationships of genera in the subtribe Oleinae.

Resolving the Phylogeny of the Olive Family (Oleaceae): Confronting Information from Organellar and Nuclear Genomes

“…We also put into question the idea that Ligustrinae is sister to all other lineages in Oleeae [ 3 , 35 , 36 ] favoring the alternative hypothesis of Schreberinae being the one (as in [ 31 ], where the whole plastid genome and single-nucleotide polymorphisms datasets gathered from more than 11,000 nuclear genes were used). Finally, we were also able to better define the relationships within Oleeae wherein some genera appeared as polyphyletic (i.e., Chionanthus, Olea, Osmanthus, Nestegis ) or paraphyletic (i.e., Schrebera , Syringa ) confirming previous reports from the literature [ 26 , 28 , 30 , 31 , 32 ].…”

“…The ingroup included species representing all currently recognized tribes, subtribes and genera in Oleaceae. For such list, we followed the current checklist of accepted taxa in Oleaceae that has been reviewed by the staff at Royal Botanic Gardens (Kew), as part of the project “World Checklist of Selected Plant Families” [ 54 ], and the most recent literature (e.g., [ 32 , 55 ]). The outgroup comprised two species also in the Lamiales order, Avicennia marina (Acanthaceae) and Sesamum indicum (Pedaliaceae), and two species in the Solanales order, Capsicum annuum and Solanum lycopersicum (both in Solanaceae).…”

“…Oleaceae’s systematics has evolved from being based on morphological, cytological, and biochemical traits (e.g., [ 4 , 14 , 27 ]), to the use of molecular phylogenies during the last two decades. Such advances, though, have mainly consisted in studies that focused on specific groups or partially resolved phylogenetic trees [ 11 , 26 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 , 36 ], and not on the whole family (but see [ 3 , 37 ]). This has been mainly due to difficulties to sample all main Oleaceae lineages and to take into account variable ploidy levels [ 31 ].…”

Genetic Diversity and Population Structure Revealed by SSR Markers on Endemic Species Osmanthusserrulatus Rehder from Southwestern Sichuan Basin, China

“…However, research on O. serrulatus, especially genetic studies [8], remains limited. Despite research efforts in regard to the phylogeny and evolution [9,10], genetic diversity and population structure [11][12][13][14] of O. fragrans (Thunb.) Lour., there is an urgent need to explore the genetic relationships of O. serrulatus with neutral markers, e.g., microsatellites, to obtain a better understanding of its genetic diversity and population structure.…”

Annual report of new taxa and new names for Chinese plants in 2020

“…The taxa published by C. I Peng were completed with other collaborators in 2020. (Wang & Jia, 2020;Bai et al, 2020 Nova Hedwigia 150: 193-200. 2020 [193] Wu & al., Fl.…”