Topic
Malaxideae
About: Malaxideae is a research topic. Over the lifetime, 56 publications have been published within this topic receiving 235 citations.
Papers published on a yearly basis
Papers
TL;DR: The traditional classification system of the tribe using characters primarily related to floral morphology does not reflect the evolutionary history of these taxa, and it seems evident that Malaxideae will need to be divided into at least seven genera.
Abstract: Nuclear ITS and plastid matK sequences were collected for 71 taxa of Malaxideae (Orchidaceae). Resulting cladograms are highly resolved and well supported by jackknife analyses. These indicate that the traditional classification system of the tribe using characters primarily related to floral morphology does not reflect the evolutionary history of these taxa. Rather, the tribe is split into two major clades: one of terrestrial species and another of epiphytes. Within the epiphytic clade, taxa with laterally compressed leaves (Oberonia) are monophyletic, whereas the remaining taxa (Liparis pro parte) have elongate conduplicate leaves and form a paraphyletic grade of at least two additional monophyletic lineages. Within the terrestrial clade, taxa with plicate leaves (Liparis p.p. and Malaxis p.p.) clearly separate from taxa with conduplicate leaves (Liparis p.p. and Malaxis p.p.). Although further taxon sampling should take place before nomenclature is changed, it seems evident that Malaxideae will need to be divided into at least seven genera. Furthermore, the transition from epiphytic to terrestrial habit is documented to have occurred only once in Malaxideae, and the value of vegetative over reproductive features in classifying some groups of orchids is again demonstrated.
118 citations
TL;DR: The taxonomy of the genus Malaxis is still obscure, even though many researchers have attempted clarification in the past 200 years, and most authors have followed treatments of Schlechter (1911) and Seidenfaden (1978).
Abstract: Malaxis Solander ex Swartz (1788), the main genus of the tribe Malaxideae (Orchidaceae), consists of about 300 species that are widespread in the tropics and subtropics of the old and new worlds. Only one species of this genus, namely Malaxis monophyllos (Linneaus, 1753: 947) Swartz (1800: 234), has previously been recorded from China (Chen et al. 2009). The taxonomy of the genus is still obscure, even though many researchers have attempted clarification in the past 200 years. (Ridley 1888, Smith 1930, Schlechter 1911, Seidenfaden 1978, Dressler 1993). Undoubtedly, Malaxis is polyphyletic (Cameron 2005, Pridgeon et al. 2006). Most authors have followed treatments of Schlechter (1911) and Seidenfaden (1978) in accepting a broadly defined Malaxis (Smith 1930, Dressler 1993, Chen, 1999).
52 citations
1 Jan 2015
TL;DR: Two new species found in Southwest China and northern Vietnam, Platystyliparis malipoensis G.D.Tang,X.Y.Zhuang Z.J.Liu and Cestichis pingtaoi were described based on the molecular analysis and morphological observation.
Abstract: Malaxideae is a larger cosmopolitan orchid tribe consisting of nearly 2 000 species and is distributed worldwide,excluding the polar and desert regionsIt is abundant in the tropical regions,particularly in Australia,and the tropical Asia,Southeast Asia,the tropical Americas and AfricaMolecular and morphological analyses have been performed to establish the phylogenetic relationships within this tribeHowever,the subtribe and intergeneric relationships remain unclear,and the genus definition of this tribe is considerably controversialThe maximum parsimony,maximum likelihood and Bayesian inference analyses were performed based on the combined sequences of the nuclear ITS and chloroplast matK genes of 133taxa(10other allied species as outgroups),which represent nearly all of the major genera of the MalaxideaeThese results suggested that Malaxideae could be divided into three clades,the epiphytic Oberoniinae,the terrestrial Liparidinae,and a terrestrial CrepidiumcladeThe Oberoniinae and Liparidinae could be divided into six genera and five genera respectively,and Crepidiumclade camposes of four generaThe subtribe Ypsilorchidinae should be attributed to OberoniinaeDisticholiparisshould be removed because it shared the same type with StichorkisThe phylogenetic relationship of Crepidiumand Dieniais monophyletic,although they have different lip structuresIn addition,two new species found in Southwest China and northern Vietnam,Platystyliparis malipoensis GDTang,XYZhuang ZJLiu and Cestichis pingtaoi GDTang,XYZhuang ZJLiu,were described based on the molecular analysis and morphological observation
16 citations
TL;DR: The tribe Malaxideae (Orchidaceae, subfamily Epidendroideae) in Madagascar and adjacent archipelagos is revised and the four genera: Liparis, Malaxis, Oberonia and Stichorkis are described.
Abstract: Summary. The tribe Malaxideae (Orchidaceae, subfamily Epidendroideae) (sensu Pridgeon et al. 2005: 453) in Madagascar and adjacent archipelagos is revised. In this region it comprises the four genera: Liparis, Malaxis, Oberonia and Stichorkis. All of the species are described and their typification, history, identification, distribution and habitat are discussed. Conservation assessments and distribution maps are included. A checklist of the genera and species and a key to their identification are provided. Six new species: Liparis bemarahensis, L. bosseri, L. chantaliae, L. laurentii, L. magnifica and L. superclareae are described.
15 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 2 |
| 2020 | 8 |
| 2019 | 5 |
| 2018 | 5 |
| 2017 | 5 |
| 2016 | 2 |