A new species of Petrocosmea (Gesneriaceae) from Myanmar

The new species Petrocosmea villosa D.J.Middleton from Shan State, Myanmar is described. It is most similar to Petrocosmea kerrii Craib, P. crinita (W.T.Wang) Z.J.Qiu and P. heterophylla B.L.Burtt in Petrocosmea sect. Deinanthera but differs particularly in inflorescence structure, inflorescence indumentum and in the long calyx lobes.

A new species of Begonia sect. Diploclinium, Begonia bhutanensis, from Bhutan

Begonia bhutanensis P.Gyeltshen & M.Hughes (Begoniaceae) is described from the warm broadleaved forests of Zhemgang district in Bhutan. It is assigned to Begonia sect. Diploclinium as it has a tuberous habit and bifid placentae and is similar to Begonia rubella Buch.-Ham. ex D.Don, but differs in having fimbriate bracts (not entire) and rounded wings on the capsule (not elongate triangular). A key to species of Begonia sect. Diploclinium in Bhutan is provided.

A replacement name for a Philippine species of Actinodaphne (Lauraceae)

We propose the replacement name Actinodaphne ramosii Brambach & Pelser for Actinodaphne lanceolata (Merr.) Kosterm. ex Brambach & Pelser, an illegitimate later homonym of Actinodaphne lanceolata Dalzell & A.Gibson.

Two endemic new species of Begonia (Begoniaceae) from Palawan, Philippines

On recent expeditions, two endemic new species of Begonia sect. Baryandra, Begonia obscuribracteata Y.P.Ang, Cabanillas & M.N.Tamayo and Begonia tandikan Pranada, L.M.Camangeg, Cabanillas & Y.P.Ang, were discovered and are hereby described and illustrated. Begonia obscuribracteata is similar to B. cabanillasii Y.P.Ang et al. in having suborbicular leaves that are adaxially hairy, five conspicuous wings on the ovary, and tepals that are hairy on the outside. However, it can be easily distinguished by features of its leaves, stipules, and bracts. A key to similar Begonia species with a conspicuous 5-winged ovary is provided. Begonia tandikan morphologically resembles B. beijnenii Y.P.Ang et al. but differs by having a broadly ovate (vs subrhomboid) lamina with a villous (vs glabrous) upper surface, shorter and wider stipules with aristate (vs cuspidate) apices, and minutely pilose (vs glabrous) bracts. Following IUCN guidelines, Begonia obscuribracteata is assessed as Endangered (EN) and Begonia tandikan as Critically Endangered (CR).

Six new species and eight new records of Gesneriaceae from Laos

Six new species of Gesneriaceae from Laos, namely Didymocarpus angustiflorus Souvann. & Lanors., D. bolavenensis Souvann., Soulad. & Phonep., D. laoticus Souvann. & Lanors., D. trilobus Souvann. & Phonep., Hemiboea olivifolia Souvann. & Tagane and Paraboea planiflora Souvann. & Lanors., are described and illustrated. Additionally, Aeschynanthus bracteatus Wall. ex A.DC., A. micranthus C.B.Clarke, Epithema ceylanicum Gardner, Lysionotus serratus D.Don, Microchirita luteola C.Puglisi, Paraboea swinhoei (Hance) B.L.Burtt, Petrocosmea kerrii Craib and Pseudochirita guangxiensis (S.Z.Huang) W.T.Wang, are newly recorded for the flora of Laos.

Flora of Singapore precursors, 27: Typifications in the yam family (Dioscoreaceae) and the resurrection of Dioscorea tenuifolia

Nomenclatural notes on several native species of Dioscoreaceae from Singapore are presented here. Twenty-three names, including nineteen synonyms, are typified. Dioscorea tenuifolia Ridl. is resurrected to the rank of species from a variety.

Flora of Singapore precursors, 29: A new name for Ficus dubia Wall. ex King (Moraceae)

The new name Ficus lindsayana Beentje is proposed for the later homonym Ficus dubia Wall. ex King (Moraceae).

Typifications of Malesian Putranjivaceae

A review of names and types in Putranjivaceae relevant to Malesia has been undertaken. Fifty-six lectotype designations (including three second-step lectotypifications) and four neotype designations are given. In addition, a previous lectotypification is discussed.

Thysananthus ciliaris (Lejeuneaceae, Marchantiophyta), a rare species new to Singapore from the Singapore Botanic Gardens

Thysananthus ciliaris, a rare and poorly known species from Southeast Asia, is newly discovered in Singapore in the Singapore Botanic Gardens. Its oil bodies are here reported for the first time for the species. The geographical distribution of all published occurrences of the species is briefly discussed. Provisional conservation assessments are given at the global and Singapore national levels based on current knowledge. A lectotype is designated in a second step lectotypification.

Taxonomic updates to Artocarpus subgenus Artocarpus (Moraceae) and allied taxa with a particular focus on the species native to Singapore

The breadfruit genus Artocarpus J.R.Forst. & G.Forst. (Moraceae) has sixteen species in Singapore, fourteen of them native. In this precursory study to the treatment of Artocarpus for the Flora of Singapore, we present updated phylogenomic analyses of Artocarpus subgenus Artocarpus based on 517 nuclear genes. The following taxonomic changes based on recent phylogenetic analyses, review of herbarium specimens, and field observations, are proposed. Artocarpus subg. Cauliflori (F.M.Jarrett) Zerega is reduced to a section within Artocarpus subg. Artocarpus, and Artocarpus sect. Glandulifolium F.M.Jarrett is raised to subgenus status. The new monotypic subgenus Artocarpus subg. Aenigma E.M.Gardner & Zerega is proposed for Artocarpus sepicanus Diels, whose phylogenetic position remains uncertain and may be of ancient hybrid origin. Artocarpus elasticus Reinw. ex Blume, A. scortechinii King and A. corneri Kochummen are recognised as distinct species. Artocarpus clementis Merr. is reinstated as distinct from A. lanceifolius Roxb. Artocarpus calophyllus Kurz and A. melinoxylus Gagnep. are reinstated as distinct from both A. chama Buch.-Ham. and A. rigidus Blume. Artocarpus nigrescens Elmer is reinstated as distinct from A. treculianus Elmer. Keys to the subgenera, the sections of Artocarpus subg. Artocarpus and to the species found in Singapore are presented. A nomenclatural synopsis of subgenera Artocarpus, Aenigma and Glandulifolium is presented with taxonomic notes to aid in identification. Seventeen lectotypes, six of them in a second step, and two neotypes are designated.