New species and new combinations in Sonerila and Phyllagathis (Melastomataceae) from Thailand

While revising the Melastomataceae for the Flora of Thailand, we discovered two new species of Sonerila, as well as the need for transferring two species of Tylanthera endemic to Thailand into Phyllagathis. Sonerila urceolata and S. loeiensis are endemic to the southeast and the northeast of Thailand, respectively. The first is allied to the widespread S. erecta Jack, from which it differs mainly in the strongly urceolate capsule and the sessile fruit placenta; the second is distinguished from other acaulescent species of Sonerila by its extremely long-petiolate large leaves and long-pedunculate inflorescence. The new combinations, Phyllagathis tuberosa (Hansen) Cellinese & Renner and P. siamensis Cellinese & Renner nom. nov., are made because both taxa lie inside the morphologic and phylogenetic bounds of Phyllagathis

Revision on the genus Phyllagathis (Melastomataceae: Sonerileae). I. The species in Burma, Thailand, Peninsular Malaysia and Sumatra

A revision of the genus Phyllagathis Blume is presented under a wider generic concept than used by earlier authors. A comprehensive synopsis of the genus is provided in the general part, where morphological characters and their variations are discussed. This paper will focus in particular on the species occurring in Burma, Thailand, Peninsular Malaysia (West Malaysia), and Sumatra. Here, the genus includes 10 species, most of which are endemic to Peninsular Malaysia, with only two species endemic to Thailand (P. siamensis and P. tuberosa), and two other also occurring outside the Malaysian political boundaries (P. rotundifolia and P. hispida). Part II of this paper will treat the species of Borneo and Natuna Island

Eight new species and a new name in the genus Elatostema (Urticaceae) on Mount Kinabalu, Sabah, Malaysia

The genus Elatostema J.R. Forst. & G. Forst. (Urticaceae) is a large Palaeotropical group with perhaps 300 or more species. Eight new species are described here, six of which are endemic to Mt Kinabalu, and a new name is established

Phyllagathis nanakorniana (Melastomataceae), a new species from Thailand

A new species of Phyllagathis (Melastomataceae), P. nanakorniana, from Thailand is described and illustrated from recently collected material. The morphological characteristics are discussed in view of a wider generic concept that allows the inclusion of P. nanakorniana in Phyllagathis. A key to the Thai species is provided

Taxonomic and biogeographic implications of a phylogenetic analysis of the Campanulaceae based on three chloroplast genes

Campanulaceae are a large, nearly cosmopolitan angiosperm family that are well‐accepted as monophyletic but whose intrafamilial and intrageneric relationships are controversial. We used DNA sequences of the chloroplast genes atpB, matK, and rbcL to infer the phylogeny of 102 taxa in 41 genera plus four outgroup taxa. Our sampling represents a wide taxonomic and geographic diversity from within the family. Results from maximum parsimony and Bayesian analyses provide strong evidence for two major clades in the family, with the platycodonoids sister to the remaining members of the family, the wahlenbergioids and campanuloids. There are two clear divisions within the campanuloids that correspond well with the historical Campanula s.str. and Rapunculus groups of Boissier and Fedorov. The phylogenetic positions of the Northern European species Wahlenbergia hederacea and the genus Jasione remain unresolved. Our results also provide evidence that the large, inclusive genera Wahlenbergia and Campanula are polyphyletic, and the smaller, segregate genera Symphyandra, Prismatocarpus, and Legousia are not monophyletic. Insights are provided into the different biogeographic origins of several oceanic island endemics. Heterochaenia, Nesocodon, and Berenice occur in a single clade, which suggests a single colonization of the Indian Ocean Mascarene Islands. Conversely, Wahlenbergia linifolia and W. angustifolia of St. Helena Island in the mid‐Atlantic are not sister taxa. The Macaronesian taxa, Canarina canariensis, and Musschia aurea, which display convergent bird‐pollination adaptations and with Azorina vidalii of the Azores, woody growth form, fall into separate major lineages. The North American Campanulaceae also do not form a monophyletic group, providing evidence that these taxa are the descendents of multiple introductions onto the North American continent