Three new Newmania species (Zingiberaceae: Zingibereae) from central Vietnam

Three new Newmania species, N. cristata , N. gracilis and N. sontraensis , are described here, bringing the number of species in this endemic Vietnamese genus to six. Descriptions, notes on ecology, phenology, distribution, preliminary IUCN assessments and colour plates are provided for each newly described species. An updated key to all six species and a map of their distributions are also given. We also report pseudovivipary in Newmania for the first time, namely in N. cristata .