F. S. P. Ng

Bio: F. S. P. Ng is an academic researcher. The author has contributed to research in topics: Woody plant. The author has an hindex of 1, co-authored 1 publications receiving 2 citations.

The genus Vitex (Labiatae) in the Flora Malesiana region, excluding New Guinea

Abstract: A revision of the genus Vitex is presented for the Flora Malesiana region excluding New Guinea. A key to all 16 species and two subspecies for the Flora Malesiana is provided. Descriptions are given of species, notes on ecology, distribution, local uses, vernacular names and conservation status are given for all species from the Flora Malesiana region which were not included in the species treatment for New Guinea, and those that were included in the latter treatment are usually expanded. Vitex medusaecalyx H. J. Lam, V. siamica F. N. Williams and V. vestita Wall. ex Walp. are lectotypified in this paper and 18 names are placed into synonymy for the first time. Seven names are treated as doubtful names and 35 names are excluded from the present definition of the genus.

A contribution to the systematics of Xylopia (Annonaceae) in Southeast Asia

Abstract: Herbarium and field study of Xylopia L. (Annonaceae) for the Flora of Peninsular Malaysia and the Flora of Thailand projects has clarified regional diversity patterns within this ecologically significant lowland rainforest genus. Two species groups represented within Southeast Asian floras are delineated, one centred on Xylopia ferruginea (Hook.f. & Thomson) Baill. and the other on Xylopia malayana Hook.f. & Thomson. In the Xylopia ferruginea group, a new species, Xylopia erythrodactyla D.M.Johnson & N.A.Murray, is distinguished from X. ferruginea, and a new combination, Xylopia sumatrana (Miq.) D.M.Johnson & N.A.Murray, is proposed, based on an earlier name for the species currently known as Xylopia stenopetala Oliv. In the Xylopia malayana group, review of the species Xylopia elliptica Maingay ex Hook.f. & Thomson resulted in the recognition of three additional species: Xylopia platycarpa D.M.Johnson & N.A.Murray, from southern Thailand and northwestern Peninsular Malaysia, Xylopia ngii D.M.Johnson & N.A.Murray, from Peninsular Malaysia, Sumatra and Borneo, and Xylopia heterotricha D.M.Johnson & N.A.Murray, from Sumatra and Borneo. The taxon Xylopia malayana Hook.f. & Thomson var. obscura Kochummen is placed in synonymy under Xylopia elliptica sensu stricto. Xylopia fusca Maingay ex Hook.f. & Thomson var. sessiliflora Kochummen & Whitmore is distinguished from Xylopia fusca, and raised to species status as Xylopia sessiliflora (Kochummen & Whitmore) D.M.Johnson & N.A.Murray. We recognise 23 Xylopia species in the Sundaic region of Southeast Asia, and provide evidence that additional collecting and taxonomic analysis in the region is needed.